Computes a score factor based on a term or phrase's frequency in a document. This value is multiplied by the {@link #Idf(Term, Searcher)} factor for each term in the query and these products are then summed to form the initial score for a document.

Terms and phrases repeated in a document indicate the topic of the document, so implementations of this method usually return larger values when

is large, and smaller values when

CopyC#

freq

is small.

The default implementation calls {@link #Tf(float)}.