In its raw frequency variety, tf is simply the frequency in the "this" for each document. In Each and every document, the term "this" appears at the time; but given that the document 2 has more phrases, its relative frequency is more compact.log ⁡ N n t = − log ⁡ n t N displaystyle log frac N n_ t =-log frac n_ t N After you included the requ