A frequency distribution refers to how often different things occur or are grouped together. It shows the number of times each item or group appears in a data set. Full definition
When looking at the age frequency distribution of current candidates, all ages are represented — there are many candidates below 30 years old and there are many candidates above 50 years of age. (nbpts.org)
Regarding statistical analyses a descriptive analysis for the variables weight, sex and age was performed, with frequency distribution among the 3 different groups, obtaining the median and range for each variable. (scielo.br)
Two groups that form distinct clusters are likely to exhibit different frequency distributions over various genes, leading to group differences. (nextleft.org)