fre‧quen‧cy W3 plural frequencies
the number of times that something happens within a particular period of time or within a particular group of people
the frequency of serious road accidents
the high/low frequency (of something)
the higher frequency of diabetes in older people
Side effects from prescribed drugs are being reported with increasing frequency (=more and more often).
The relative frequency of fraternal twins has halved since 1950.
the fact that something happens a lot [= regularity]:
Businesses come and go with alarming frequency.