1. A method for providing search results in response to a search query, the method comprising: building a temporal profile of the search query from temporal data associated with documents retrieved in response to the search query; determining from features of the temporal profile whether the search query would benefit from relevance feedback from a user; seeking the relevance feedback from the user if there is a determination that the search query will benefit from the relevance feedback from the user; and providing search results based on the relevance feedback.