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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"
   - frequence, oftenness
    
2. The ratio of the number of observations in a statistical category to the total number of observations
   - relative frequency
    
3. The number of observations in a given statistical category
   - absolute frequency

Derived forms: frequencies

See also: frequent

Type of: cardinal, cardinal number, rate, ratio

Encyclopedia: Frequency Frequency, periodicity, amplitude for sinusoids