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frequency

noun [C or U] (HAPPENING)
 
 
/ˈfriː.kwən.si/

Definition

the number of times something happens within a particular period, or the fact of something happening often or a large number or times: Complaints about the frequency of trains rose by 201 percent in the last year. the increasing frequency of terrorist attacks It's not the duration of his absences from work so much as the frequency that worries me.Frequency and regularity - general words
(Definition of frequency noun (HAPPENING) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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