2. The method of claim 1 , wherein the step of generating the weighted singleton histogram includes: ordering the singletons from a largest total characters to a smallest total characters of the singletons.
2. The method of claim 1 , wherein the step of generating the weighted singleton histogram includes: ordering the singletons from a largest total characters to a smallest total characters of the singletons. 3. The method of claim 2 , wherein, in the step of computing the total popularity score of each singleton, the popularity of a small character singleton does not increase if it is part of a larger character singleton.