[ noun ] (statistics) a coefficient assigned to elements of a frequency distribution in order to represent their relative importance
Used in print(A.L. Kroeber, "Semantic Contribution of Lexicostatistic...)
As to relative_frequencies of competing roots ( 7 - 1 vs. 4 - 4 , etc_. ) , Thomas with his ' weighting ' seems to be the first to have considered the significance this might have .