# frequency
## English
### Alternative forms

* frequence (obsolete)

### Etymology

From Latin frequentia, from frequens. English equivalent frequent +‎ -cy.

### Pronunciation

* enPR: frĕʹkwən-sē, IPA: /ˈfɹiːkwənsi/
* Audio (Southern England):(file)

### Noun

frequency (countable and uncountable, plural frequencies)
* (uncountable or countable) The rate of occurrence of anything; the relationship between incidence and time period.
    With growing confidence, the Viking’s raids increased in frequency.
    The frequency of bus service has been improved from one every 15 to one every 12 minutes.
* (uncountable) The property of occurring often rather than infrequently.
    The FAQ addresses questions that come up with some frequency.
    The frequency of the visits was what annoyed him.
* (countable) The quotient of the number of times $n$ a periodic phenomenon occurs over the time $t$ in which it occurs: $f=n/t$.
    The frequency of the musical note A above middle C is 440 oscillations per second.
    The frequency of a wave is its velocity $v$ divided by its wavelength $\lambda$: $f=v/\lambda$.
    Broadcasting live at a frequency of 98.3 megahertz, we’re your rock alternative!
    The frequency for electric power in the Americas is generally 60 Hz rather than 50.
** 1976, James Martin, Telecommunications and the Computer:36 MHz transponder providing a pool of 794 reallocatable frequencies.
** 2015, Patrick R. Nicolas, Scala for Machine Learning, page 109: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
** 2023 August 31, Frankie de la Cretaz, “Postcard from Camp Gaylore”, in Cosmopolitan‎: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.
* (statistics) number of times an event occurred in an experiment (absolute frequency)

#### Synonyms

* (rate of occurrence): oftenness; see also Thesaurus:commonness and Thesaurus:frequency
* freq

#### Antonyms

* (antonym(s) of “rate of occurrence”): period

#### Derived terms

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

#### Related terms

* frequent
* frequentative
* frequenter

#### Translations

    The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

#### See also

* cadence
* commonness
* occurrence
* periodicity

### Further reading

* Frequency (disambiguation) on Wikipedia.Wikipedia
* “frequency”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
* “frequency”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.
* “frequency”, in OneLook Dictionary Search.

### Anagrams

* quefrency