1. 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

Similar word(s): frequence, oftenness

Definition categories: time, rate

2. the ratio of the number of observations in a statistical category to the total number of observations

Definition categories: link, ratio

3. the number of observations in a given statistical category

Definition categories: quantity, cardinal