relative frequency
noun
,
Statistics.
1.
the ratio of the number of times an event occurs to the number of occasions on which it might occur in the same period.
British Dictionary definitions for
relative frequency
relative frequency
noun
1.
the ratio of the actual number of favourable events to the total possible number of events; often taken as an estimate of probability
the proportion of the range of a random variable taking a given value or lying in a given interval