Meaning of FREQUENCY in English

FREQUENCY

/ ˈfriːkwənsi; NAmE / noun ( pl. -ies )

1.

[ U , C ] the rate at which sth happens or is repeated :

Fatal road accidents have decreased in frequency over recent years.

a society with a high / low frequency (= happening often / not very often) of stable marriages

The program can show us word frequency (= how often words occur in a language) .

2.

[ U ] the fact of sth happening often :

the alarming frequency of computer errors

Objects like this turn up at sales with surprising frequency.

3.

[ C , U ] ( technical ) the rate at which a sound or electromagnetic wave vibrates (= moves up and down) :

a high / low frequency

4.

[ C , U ] ( technical ) the number of radio waves for every second of a radio signal :

a frequency band

There are only a limited number of broadcasting frequencies.

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WORD ORIGIN

mid 16th cent. (gradually superseding late Middle English frequence ; originally denoting a gathering of people): from Latin frequentia , from frequens , frequent- crowded, frequent.

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.