12. One or more non-transitory computer-readable media storing instructions that, when executed by one or more computing devices, cause performance of: generating one or more query logs that record information about previously received search queries, including, for the previously received search queries, indications of in which specific contexts, of a plurality of search contexts, the previously received search queries have been made over at least a period of time; receiving a search query; determining at least one suggested query, of the previously received search queries, based on the search query; determining, for each specific search context of a plurality of search contexts: a log-based relevance score of the search query to the specific search context, the log-based relevance score being calculated, at least in part, using a count of how many times the search query was made in the specific search context over the period of time, and further using a count of how many times the suggested query was made in the specific search context over the period of time, as recorded in the one or more query logs; wherein each search context of the plurality of search contexts is a different set of searchable information; responsive to receiving the search query, sending an indication, for each specific search context of the plurality of search contexts, of a relative size of the log-based relevance score determined for the specific search context compared to relative sizes of each other log-based relevance score determined for each other search context of the plurality of search contexts.
14. The one or more non-transitory computer-readable media of claim 12 , wherein determining each log-based relevance score comprises: using a normalizing function based at least on : (1) a total number of queries that have been previously submitted in any of the plurality of search contexts over the period of time and (2) a total number of queries that have been previously submitted in the specific search context over the period of time.