WordNet 3.0
Noun (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”Synonyms: frequencyfrequence
Webster's Dictionary (GCIDE)
Oftenness \Of"ten*ness\, n. Frequency. --Hooker. [1913 Webster]