17. The non-transitory computer-readable medium of claim 15 , where the instructions further include: one or more instructions to determine another document associated with at least one of the second quantity of links; and one or more instructions to determine a score associated with the other document, the score being determined by ignoring a contribution of the at least one of the second quantity of links to the score.
15. A non-transitory computer-readable medium storing instructions, the instructions comprising: one or more instructions, which, when executed by one or more processors, cause the one or more processors to: determine, for a first time period, a first quantity of links associated with a document; determine, for a second time period, a second quantity of links associated with the document, the second time period being subsequent to the first time period, and the second quantity of links being less than the first quantity of links; identify a first weight associated with each link of the second quantity of links; determine, based on the first weight, a second weight; determine, based on the determined second weight and the second quantity of links being less than the first quantity of links, that the document is stale; and process, based on determining that the document is stale, the document.