---- Supplemental status - from "low impressions" in search results?
Eathan - 4:12 pm on Jun 26, 2007 (gmt 0)
I noticed the patent is not even talking about clicks or actual traffic here. It's talking about how often the document is even chosen for placement in the the search results -- impressions.
In the snippet you quoted I read the word "selected" to mean "clicked", as in selected by the user performing the search. In that context, the bits about changes over time and seasonality could imply weighting for increasing/decreasing popularity.