2. The method of claim 1 , wherein the content location for each occurrence of the query is based on a document location of a resource referenced by a search result that is selected by a user in response to the occurrence of the query.
3. The method of claim 2 , wherein determining catchment area matches for the query for each catchment area comprises determining a catchment area match only for each catchment area in which the origin location for an occurrence of the query and the content location for the occurrence of the query are located.