1.Definition: the number of observations in a given statistical category

Category: General

2.Definition: the number of occurrences within a given time period

"The frequency of modulation was 40 cycles per second", "The frequency of his seizures increased as he grew older"

Related Noun(s):frequence, oftenness

Category: General

3.Definition: the ratio of the number of observations in a statistical category to the total number of observations

Category: General