5. The method of claim 1 , where the generated score is a first score, the method further comprising: generating a second score, for the document, that is based on a relevance of the document to a search query; and combining the first and second scores to generate an overall score, where ranking the document includes ranking the document with regard to the at least one other document based on the overall score.
1. A method performed by one or more devices, the method comprising: determining, by at least one of the one or more devices, a first average amount of time that a first set of users spent accessing a document during a first time period; determining, by at least one of the one or more devices, a second average amount of time that a second set of users spent accessing the same document during a second time period, the second time period occurring after the first time period; comparing, by at least one of the one or more devices, the first average amount of time to the second average amount of time determining, by at least one of the one or more devices and based on the comparing, that the first average amount of time is different from the second average amount of time classifying, by at least one of the one or more devices, the document as stale or fresh based on determining that the first average amount of time is different from the second average amount of time, the classifying including: classifying the document as stale when the first average amount of time is greater than the second average amount of time, and classifying the document as fresh when the first average amount of time is less than the second average amount of time generating, by at least one of the one or more devices, a score for the document based on classifying the document as stale or fresh; and ranking, by at least one of the one or more devices, the document with regard to at least one other document based on the generated score.