- frequency, frequence, oftenness - the number of occurrences within a given time period (usually 1 second); "the frequency of modulation was 40 cycles per second"
--1 is a kind of rate
--1 has particulars:audio, audio frequency; radio frequency; infrared, infrared frequency; wave number; count per minute, counts/minute; sampling frequency - frequency, relative frequency - the ratio of the number of observations in a statistical category to the total number of observations
--2 is a kind of ratio
--2 has particulars: incidence, relative incidence - frequency, absolute frequency - the number of observations in a given statistical category
--3 is a kind of cardinal number, cardinal