A Frequency (uncountable) The rate of occurrence of anything; the relationship between incidence and time period. (uncountable) The property of occurringoften rather than infrequently. (countable) The quotient of the number of times {\displaystyle n}: a periodic phenomenonoccurs over the time {\displaystyle t}: in which it occurs: {\displaystyle f=n/t}:. (statistics) number of times an event occurred in an experiment (absolute frequency) Frequency (statistics) - Wikipedia Synonyms (rate of occurrence): oftenness freq Antonyms (rate of occurrence): period