View source for Frequency

==English==

===Alternative forms===
* {{alt|en|frequence||obsolete}}

===Etymology===
From {{der|en|la|frequentia}}, from {{m|la|frequens}}. [[English]] equivalent {{af|en|frequent|-cy}}.

===Pronunciation===
* {{enPR|frĕʹkwən-sē}}, {{IPA|en|/ˈfɹiːkwənsi/}}
* {{audio|en|LL-Q1860 (eng)-Vealhurl-frequency.wav|a=Southern England}}

===Noun===
{{en-noun|~}}

# {{lb|en|uncountable|or|countable}} The [[rate]] of [[occurrence]] of anything; the relationship between [[incidence]] and time [[period]].
#: {{ux|en|With growing confidence, the Viking’s raids increased in '''frequency'''.}}
#: {{ux|en|The '''frequency''' of bus service has been improved from one every 15 to one every 12 minutes.}}
# {{lb|en|uncountable}} The [[property]] of [[occur]]ring [[often]] rather than [[infrequently]].
#: {{ux|en|The FAQ addresses questions that come up with some '''frequency'''.}}
#: {{ux|en|The '''frequency''' of the visits was what annoyed him.}}
# {{lb|en|countable}} The [[quotient]] of the number of times <math>n</math> a [[periodic]] [[phenomenon]] occurs over the [[time]] <math>t</math> in which it occurs: <math>f = n / t</math>.
#: {{ux|en|The '''frequency''' of the musical note A above middle C is 440 oscillations per second.}}
#: {{ux|en|The '''frequency''' of a wave is its velocity <math>v</math> divided by its wavelength <math>\lambda</math>: <math>f = v / \lambda</math>.}}
#: {{ux|en|Broadcasting live at a '''frequency''' of 98.3 megahertz<!--fictional station-->, we’re your rock alternative!}}
#: {{ux|en|The '''frequency''' for electric power in the Americas is generally 60 Hz rather than 50.}}
#* {{quote-book|en|year=1976|author=James Martin|title=Telecommunications and the Computer|passage=36 MHz transponder providing a pool of 794 reallocatable '''frequencies'''.}}
#* {{quote-text|en|year=2015|author=Patrick R. Nicolas|title=Scala for Machine Learning|page=109
|passage=In this case, a band-pass filter using a range or window of '''frequencies''' is appropriate to isolate the '''frequency''' or the group of '''frequencies''' that characterize a specific cycle.}}
# A [[tone]], [[character]], [[mood]], or [[vibe]]
#* {{quote-journal|en|date=2023-08-31|author=Frankie de la Cretaz|title=Postcard from Camp Gaylore|journal={{w|Cosmopolitan (magazine)|Cosmopolitan}}|url=https://www.cosmopolitan.com/lifestyle/a44903791/taylor-swift-queer-theories-camp-gaylore/|passage=And if you ''haven’t'' picked up on the gay '''frequencies''' in her lyrics, her wig choices, and her possible lesbian salutes? Maybe that’s because they weren’t meant for you. IYKYK.}}
# {{lb|en|statistics}} [[number]] of times an event occurred in an experiment ([[absolute frequency]])

====Synonyms====
* {{sense|rate of occurrence}} {{l|en|oftenness}}; see also [[Thesaurus:commonness]] and [[Thesaurus:frequency]]
* {{l|en|freq}}

====Antonyms====
* {{antsense|rate of occurrence}} {{l|en|period}}

====Derived terms====
{{col2|en|dual-frequency|angular frequency|audio frequency|extremely low frequency|frequency assignment|frequency channel|frequency distribution|frequency list|frequency modulation|frequency multiplier|frequency shift keying|frequency-shift keying|fundamental frequency|high frequency|high frequency gravitational wave|high-frequency|high-frequency gravitational wave|high-frequency trading|intermediate frequency|maximum usable frequency|Planck angular frequency|Planck frequency|radio frequency|radio frequency integrated circuit|radio-frequency|radio-frequency identification|relative frequency|super high frequency|ultra high frequency|frequency domain|bifrequency|cyclofrequency|eigenfrequency|equifrequency|frecency|gyrofrequency|isofrequency|midfrequency|monofrequency|multifrequency|overfrequency|subfrequency|trifrequency|underfrequency|unifrequency|ultra low frequency|very high frequency|dual tone multi-frequency|Larmor frequency|sub-audio frequency|time and frequency transfer|time frequency adverbial|time-frequency analysis|time-frequency representation}}

====Related terms====
* {{l|en|frequent}}
* {{l|en|frequentative}}
* {{l|en|frequenter}}

====Translations====
{{trans-top|rate of occurrence of anything}}
* Arabic: {{t+|ar|تَرَدُّد|m}}
* Aragonese: {{t|an|freqüencia|f}}
* Armenian: {{t+|hy|հաճախականություն}}
* Azerbaijani: {{t|az|tezlik}}
* Belarusian: {{t|be|частата́|f}}, {{t|be|ча́стасць|f}}
* Bulgarian: {{t+|bg|честота́|f}}
* Burmese: {{t+|my|အကြိမ်}}
* Catalan: {{t+|ca|freqüència|f}}
* Chinese:
*: Mandarin: {{t+|cmn|頻率|tr=pínlǜ}}, {{t+|cmn|頻度|tr=píndù}}, {{t+|cmn|次數|tr=cìshù}}
* Czech: {{t|cs|četnost|n}}, {{t+|cs|frekvence|f}}
* Danish: {{t+|da|hyppighed|c}}
* Dutch: {{t+|nl|frequentie|f}}
* Esperanto: {{t|eo|ofto}}
* Faroese: {{t|fo|tíðføri|n}}, {{t|fo|tíðleiki|m}}, {{t|fo|tídd|f}}
* Finnish: {{t+|fi|taajuus}}, {{qualifier|statistical}} {{t+|fi|frekvenssi}}
* French: {{t+|fr|fréquence|f}}
* Galician: {{t+|gl|frecuencia|f}}
* Georgian: {{t|ka|სიხშირე}}
* German: {{t+|de|Häufigkeit|f}}, {{t+|de|Frequenz|f}}, {{t+|de|Regelmäßigkeit|f}}
* Greek: {{t+|el|συχνότητα|f}}
* Hebrew: {{t+|he|תדירות|f|tr=tedirút}}
* Hindi: {{t+|hi|आवृत्ति|f}}
* Hungarian: {{t+|hu|gyakoriság}}, {{t+|hu|ismétlődés}}
* Icelandic: {{t+|is|tíðni|f}}
* Indonesian: {{t+|id|frekuensi}}
* Italian: {{t+|it|frequenza|f}}
* Japanese: {{t+|ja|頻度|tr=ひんど, hindo|sc=Jpan}}
* Kazakh: {{t|kk|жиілік}}
* Korean: {{t+|ko|빈도}}
* Kyrgyz: {{t+|ky|жыштык}}
* Lao: {{t+|lo|ຄວາມຖີ່}}
* Latin: {{t|la|crēbritās|f}}
* Macedonian: {{t|mk|че́стота|f}}
* Malay: {{t+|ms|kekerapan}}, {{t+|ms|frekuensi}}
* Maori: {{t|mi|auautanga}}
* Marathi: {{t|mr|वारंवारता|f}}
* Norwegian:
*: Bokmål: {{t+|nb|hyppighet|m|f}}
* Persian: {{t+|fa|بسامد|tr=basâmad}}
* Polish: {{t+|pl|częstość|f}}, {{t+|pl|częstotliwość|f}}
* Portuguese: {{t+|pt|frequência|f}}
* Romanian: {{t+|ro|frecvență|f}}
* Russian: {{t+|ru|частота́|f}}
* Scottish Gaelic: {{t|gd|bitheantas|m}}, {{t|gd|tricead|m}}
* Serbo-Croatian:
*: Roman: {{t+|sh|učestalost|f}}, {{t|sh|čestoća|f}}, {{t+|sh|čestost|f}}, {{t|sh|učestanost}}
* Slovak: {{t+|sk|frekvencia|f}}, {{t|sk|početnosť|f}}
* Slovene: {{t|sl|pogostost|f}}
* Spanish: {{t+|es|frecuencia|f}}
* Swedish: {{t+|sv|frekvens}}
* Tagalog: {{t|tl|dalas}}
* Tajik: {{t|tg|басомад}}
* Thai: {{t+|th|ความถี่}}
* Turkish: {{t+|tr|frekans}}
* Ukrainian: {{t|uk|ча́стість|f}}, {{t+|uk|частота́|f}}
* Uzbek: {{t+|uz|tezlik}}
* Vietnamese: {{t|vi|tính thường xuyên}}
* West Frisian: {{t|fy|frekwinsje}}
{{trans-bottom}}

{{trans-top|property of occurring often rather than infrequently}}
* Aragonese: {{t|an|freqüencia|f}}
* Armenian: {{t+|hy|հաճախություն}}
* Belarusian: {{t|be|частата́|f}}
* Catalan: {{t+|ca|freqüència|f}}
* Chinese:
*: Mandarin: {{t+|cmn|常常|tr=chángcháng}}
* Czech: {{t|cs|častost|n}}, {{t+|cs|frekvence|f}}
* Dutch: {{t+|nl|regelmaat|m|f}}
* Esperanto: {{t|eo|ofteco}}
* Faroese: {{t|fo|tíðføri|n}}, {{t|fo|tíðleiki|m}}, {{t|fo|tídd|f}}
* Finnish: {{t+|fi|yleisyys}}
* French: {{t+|fr|fréquence|f}}
* Galician: {{t+|gl|frecuencia|f}}
* German: {{t+|de|Häufigkeit|f}}
* Greek: {{t+|el|συχνότητα|f}}
* Hungarian: {{t+|hu|gyakoriság}}
* Italian: {{t+|it|frequenza}}
* Macedonian: {{t|mk|че́стота|f}}
* Malay: {{t+|ms|kekerapan}}
* Norwegian:
*: Bokmål: {{t+|nb|hyppighet|m|f}}
* Polish: {{t+|pl|częstość|f}}
* Portuguese: {{t+|pt|frequência|f}}
* Romanian: {{t+|ro|desime|f}}, {{t+|ro|frecvență|f}}
* Scottish Gaelic: {{t|gd|bitheantas|m}}, {{t|gd|tricead|m}}
* Slovak: {{t+|sk|frekvencia|f}}, {{t|sk|častosť|f}}
* Spanish: {{t+|es|frecuencia|f}}
* Tagalog: {{t|tl|dalas}}
* Thai: {{t+|th|ความถี่}}
* Turkish: {{t+|tr|frekans}}
* Ukrainian: {{t+|uk|частота́|f}}
{{trans-bottom}}

{{trans-top|The quotient of the number of times a periodic phenomenon occurs over the time in which it occurs}}
* Finnish: {{t+|fi|taajuus}}
* Indonesian: {{t+|id|frekuensi}}
* Maori: {{t|mi|iarere}} {{qualifier|of radio waves etc.}}
{{trans-bottom}}

{{trans-top|number of occurrences divided by time}}
* Arabic: {{t+|ar|تَرَدُّد|m}}
* Aragonese: {{t|an|freqüencia|f}}
* Armenian: {{t+|hy|հաճախություն}}
* Belarusian: {{t|be|частата́|f}}
* Bengali: {{t|bn|কম্পাঙ্ক|sc=Beng}}
* Bulgarian: {{t+|bg|честота́|f}}
* Burmese: {{t-needed|my}}
* Catalan: {{t+|ca|freqüència|f}}
* Chinese:
*: Mandarin: {{t+|cmn|頻數|tr=pínshù}}
* Czech: {{t+|cs|frekvence|f}}, {{t+|cs|kmitočet|m}} {{qualifier|of radio frequency}}
* Danish: {{t|da|frekvens|n}}
* Dutch: {{t+|nl|frequentie|f}}
* Esperanto: {{t|eo|frekvenco}}
* Faroese: {{t|fo|tíðføri|n}}, {{t|fo|tíðleiki|m}}, {{t|fo|tídd|f}}
* Finnish: {{t+|fi|taajuus}}
* French: {{t+|fr|fréquence|f}}
* Galician: {{t+|gl|frecuencia|f}}
* German: {{t+|de|Frequenz|f}}
* Greek: {{t+|el|συχνότητα|f}}
* Hebrew: {{t+|he|תדירות|f|tr=tedirút}}, {{t|he|תדר|m|tr=téder}} (''used for a radio station or a two-way radio device'')
* Hungarian: {{t+|hu|frekvencia}}
* Icelandic: {{t+|is|tíðni|f}}
* Italian: {{t+|it|frequenza|f}}
* Japanese: {{t+|ja|周波数|tr=shūhasū|sc=Jpan}}
* Khmer: {{t|km|ប្រេកង់|tr=preekɑng}}
* Korean: {{t+|ko|진동수}}
* Lao: {{t+|lo|ຄວາມຖີ່}}
* Latvian: {{t+|lv|frekvence|f}}
* Macedonian: {{t|mk|че́стота|f}}, {{t|mk|фрекве́нција|f}}
* Malay: {{t+|ms|frekuensi}}
* Norwegian: {{t+|no|frekvens|m}}
* Persian: {{t+|fa|فرکانس|tr=ferekâns}}
* Polish: {{t+|pl|częstotliwość|f}}
* Portuguese: {{t+|pt|frequência|f}}
* Romanian: {{t+|ro|frecvență|f}}
* Russian: {{t+|ru|частота́|f}}
* Serbo-Croatian:
*: Cyrillic: {{t|sh|фреквѐнција|f}}
*: Roman: {{t+|sh|frekvèncija|f}}
* Slovak: {{t+|sk|frekvencia|f}}, {{t+|sk|kmitočet|m}}
* Slovene: {{t+|sl|frekvenca|f}}, {{t|sl|pogostost|f}}
* Spanish: {{t+|es|frecuencia|f}}
* Swedish: {{t+|sv|frekvens}}
* Tagalog: {{t|tl|dalas}}
* Thai: {{t+|th|ความถี่}}
* Turkish: {{t+|tr|frekans}}
* Ukrainian: {{t+|uk|частота́|f}}
* Uzbek: {{t+|uz|chastota}}
* Vietnamese: {{t+|vi|tần số}}
{{trans-bottom}}

{{checktrans-top}}
* Latin: {{t-check|la|frequentia|f}}
* Lithuanian: {{t-check|lt|dažnumas}}
* Spanish: {{t+check|es|frecuencia}}
* Tamil: {{t+check|ta|அதிர்வெண்|sc=Taml}}
* Telugu: {{t+check|te|పౌనఃపున్యము}}
* Turkish: {{t+check|tr|frekans}}
{{trans-bottom}}

====See also====
* {{l|en|cadence}}
* {{l|en|commonness}}
* {{l|en|occurrence}}
* {{l|en|periodicity}}

===Further reading===
* {{pedia|lang=en|Frequency (disambiguation)}}
* {{R:Webster 1913}}
* {{R:Century 1911}}
* {{R:OneLook}}

===Anagrams===
* {{anagrams|en|a=ceefnqruy|quefrency}}

{{C|en|Physical quantities|Insurance|Time}}