12. The system of claim 9 wherein said scaling factor K is a monotonically decreasing function over the domain of positive integers whose range does not exceed 1 or fall below 0 where the domain represents the number of unique words (“C”) in the search query.
12. The system of claim 9 wherein said scaling factor K is a monotonically decreasing function over the domain of positive integers whose range does not exceed 1 or fall below 0 where the domain represents the number of unique words (“C”) in the search query. 15. The system of claim 12 wherein the processing unit, for each word group, divides the FQ value for the word group by the maximum FQ value to calculate an intermediate TF value and calculates TF by subtracting scaling factor K from 1, multiplying the resulting difference by the intermediate TF value, and adding the resulting product to scaling factor K.