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. 