15. The memory device of claim 10 , where the one or more instructions to determine the score include one or more instructions to determine the score without generating a relevancy score that is based on a relevance of the document to a search query.
10. A memory device comprising computer-executable instructions, comprising: one or more instructions to determine an amount that a rank of a document changes over time; one or more instructions to determine or adjust a score for the document based on the amount that the rank of the document changes over time; and one or more instructions to rank the document with regard to at least one other document based on the determined or adjusted score.