Answer:

When collecting data the number of times a particular item occurs is called its frequency.

Shoe Size	Frequency
5	2
6	5
7	9
8	6
9	3

For example, suppose the shoe sizes of the 25 people in a class were recorded and the shoe size 7 occurred 9 times. Then the frequency of shoe size 7 was 9.

The table is called a frequency table. The information in the table can be illustrated using a frequency diagram.