relative frequency

American  

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.

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relative frequency British  

noun

1. 1. the ratio of the actual number of favourable events to the total possible number of events; often taken as an estimate of probability

   2. the proportion of the range of a random variable taking a given value or lying in a given interval

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Example Sentences

They calculated that the variant is doubling in relative frequency in the United States every 10 days and is 35% to 46% more transmissible than the original virus.

From Science Magazine

The second is that measurable, predictable astronomical events occur with relative frequency.

From Salon

Although the relative frequencies of words used are highly suggestive, they cannot convey the texture of the magazine issue by issue.

From Scientific American

Words whose relative frequency peaked in each individual year were identified.

From Scientific American

Q. I have a mysterious problem that seems to be recurring with relative frequency despite “fixes.”

From Seattle Times