relative frequency vs frequency

relative frequency and frequency both are nouns.

Word	Noun	Adjective	Verb	Adverb
relative frequency	Yes	No	No	No
frequency	Yes	No	No	No

As nouns, relative frequency and frequency are synonyms defined as:

relative frequency and frequency: the ratio of the number of observations in a statistical category to the total number of observations

relative frequency (noun)	frequency (noun)
the ratio of the number of observations in a statistical category to the total number of observations	the number of observations in a given statistical category
	the ratio of the number of observations in a statistical category to the total number of observations
	the number of occurrences within a given time period