1. A method, comprising steps of: based on a plurality of factors, ranking a plurality of documents returned within the results computed for a query by a plurality of search engines; wherein each document of said plurality of documents is associated with a Uniform Resource Locator (URL); for each URL associated with a document from said plurality of documents, determining a frequency said each URL was returned by said plurality of search engines, wherein said frequency of said each URL is based on a number of said plurality of search engines that return at least one document corresponding to said each URL and a number of search engines in said plurality of search engines; wherein said plurality of factors is based on an inverse function of the frequency of the URL associated with each document of said plurality of documents; and wherein the method is performed by one or more computing devices.