frequency distribution

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A listing of all unique values or ranges of values in a set of data, along with an enumeration of the number of time each value or range of values is actually observed in that set. In a relative frequency distribution, the actual frequency of observations is replaced by the corresponding proportion of the total number of observations.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a distribution of observed frequencies of occurrence of the values of a variable