# Relative Frequency Function

A Relative Frequency Function is a frequency function that returns the ratio of an absolute frequency value to the multiset cardinality.

**Context:****Example(s):****Counter-Example(s):****See:**Multiplicity, Frequency Distribution.

## References

### 2013

- http://en.wikipedia.org/wiki/Relative_frequency
- The
**relative frequency**(or empirical probability) of an event refers to the absolute frequency normalized by the total number of events: :[math] f_i = \frac{n_i}{N} = \frac{n_i}{\sum_i n_i}. [/math]

- The