Frequency

FREQUENCY 

The frequency of a particular data value is the number of times the data value occurs.
For example, if four students have a score of 80 in mathematics, and then the score of 80 is said to have a frequency of 4.  The frequency of a data value is often represented by f.
The marks awarded for an assignment set for a Year 8 class of 20 students were as follows:
      6     7     5     7     7     8     7     6     9     7
      4     10   6     8     8     9     5     6     4     8