1. A method performed by one or more server devices, the method comprising: determining, by one or more processors associated with the one or more server devices, an update frequency that is based on how often content of a document is updated in a time period; determining, by one or more processors associated with the one or more server devices, an update amount that is based on a ratio of a quantity of new or unique pages associated with the document over a period of time versus a total quantity of pages associated with the document; generating, by one or more processors associated with the one or more server devices, a score for the document based on the determined update frequency and the determined update amount; and ranking, by one or more processors associated with the one or more server devices, the document with regard to at least one other document based, at least in part, on the score.
1. A method performed by one or more server devices, the method comprising: determining, by one or more processors associated with the one or more server devices, an update frequency that is based on how often content of a document is updated in a time period; determining, by one or more processors associated with the one or more server devices, an update amount that is based on a ratio of a quantity of new or unique pages associated with the document over a period of time versus a total quantity of pages associated with the document; generating, by one or more processors associated with the one or more server devices, a score for the document based on the determined update frequency and the determined update amount; and ranking, by one or more processors associated with the one or more server devices, the document with regard to at least one other document based, at least in part, on the score. 8. The method of claim 1 , further comprising: storing a representation of the document instead of all of the content of the document, where the representation includes a similarity hash of the document; and where determining the measure of how the content of the document changes over time includes: monitoring the similarity hash of the document to detect changes in the document.