frequency

Noun

• the number of observations in a given statistical category

• the ratio of the number of observations in a statistical category to the total number of observations

• 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 words

• Synonyms: 
  absolute frequency , relative frequency , frequence , oftenness