16. A system, comprising: one or more server devices to: determine an update frequency associated with a document, where the update frequency is based on a number of updates of content of the document in a time period; determine an update amount associated with the document, where the update amount 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; generate a score for the document as a function of both the update frequency and the update amount; and rank the document with regard to at least one other document based on the score.
16. A system, comprising: one or more server devices to: determine an update frequency associated with a document, where the update frequency is based on a number of updates of content of the document in a time period; determine an update amount associated with the document, where the update amount 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; generate a score for the document as a function of both the update frequency and the update amount; and rank the document with regard to at least one other document based on the score. 18. The system of claim 16 , where when determining the update amount, the one or more server devices are further to: determine an amount of the content of the document that has been updated or changed within the time period.