1. A computer-implemented method comprising: accessing search history for one or more search terms, wherein the search history comprises prior user search terms; and categorizing each of the one or more search terms based a number of times the respective search term appears in the search history, wherein for each of the one or more search terms, the categorizing comprises: in a case where the number of times that the search term appears in the search history exceeds a first threshold value, identifying, from the search history, a search result of the search term; and categorizing, the search term as a type that is provided for registration to a user with recognized association with the search term or a type that is excluded from registration, wherein the categorizing is based on a ratio of a number of times the search result was selected subsequent to receiving the search term to the number of times that the search term appears in the search history.