/ Dictionary / Index R relative frequency: Meaning and Definition of Find definitions for: rel'ative fre'quency Pronunciation: [key] — Statistics. Statistics. the ratio of the number of times an event occurs to the number of occasions on which it might occur in the same period. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. relative dispersion relative humidity Related Content Daily Word Quiz: leonine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language