5. The method of claim 4 , comprising: identifying a commercial query that includes both of a reference to the geographic location and a commercial search term, the commercial query being a query for which responsive search results pages include at least a minimum number of advertisements per-page, the commercial search term being a commercial phrase that is included in a query; and selecting the commercial search term as one of the one or more terms for the geographic location.
4. The method of claim 1 , comprising receiving commercial phrases for the geographic location, the commercial phrases being phrases that have caused presentation of at least a threshold number of content items on a per-content-item request basis.