1. A computer-implemented method for generating a speech recognition model, comprising: accessing a baseline speech recognition model installed on a server system; obtaining, at the server system, information from recent text search queries submitted by a plurality of users to a search system, wherein the information (i)specifies a frequency of occurrence for one or more words in the recent search queries and (ii) identifies times when instances of the one or more words were submitted to the search system in recent search queries; and modifying, by the server system, the speech recognition model to revise probabilities of a portion of a sound occurrence based on the information obtained from the recent text search queries, wherein the modification weights influences of instances of the one or more words on the revised probabilities based on times when the one or more words were submitted to the search system in recent search queries.