frequency frequency /ˈfriːkwənsi/

noun

1. () The number of occurrences within a given time period  ( frequence , oftenness , frequency )
   the number of occurrences within a given time period
    The frequency of modulation was 40 cycles per second
   the frequency of modulation was 40 cycles per second
    The frequency of his seizures increased as he grew older
   the frequency of his seizures increased as he grew older
   
2. () The ratio of the number of observations in a statistical category to the total number of observations  ( relative frequency , frequency )
   the ratio of the number of observations in a statistical category to the total number of observations
    The radio frequency was weak in the rural area
   The radio frequency was weak in the rural area
   
3. () The number of observations in a given statistical category  ( absolute frequency , frequency )
   the number of observations in a given statistical category