Let the absolute frequencies of occurrence of an event in a number of class intervals be denoted f_1, f_2, .... The cumulative frequency corresponding to the upper boundary of any class interval c_i in a frequency distribution is the total absolute frequency of all values less than that boundary, denoted F_< congruent sum_(i<=n) f_i.

absolute frequency | class interval | cumulative count | cumulative frequency polygon | frequency distribution | quantile | relative cumulative frequency | relative frequency