def search_histogram( q , count_method = 'target' , slice = 86400 , period = 30  )
      response = handle_response(get("/searchhistogram.json" , :query => { :q => q , :slice => slice , :period => period , :count_method => count_method } ))
      Topsy::SearchHistogram.new(response)
    end
def search_histogram( q , count_method = 'target' , slice = 86400 , period = 30  )
      response = handle_response(get("/searchhistogram.json" , :query => { :q => q , :slice => slice , :period => period , :count_method => count_method } ))
      Topsy::SearchHistogram.new(response)
    end
Returns mention count data for the given query

 @param [String] q - The query.  Use site:domain.com to get domain counts and @username to get mention counts.
 @param [String] count_method - what is being counted - "target" (default) -  the number of unique links , or "citation" - cthe number of unique tweets about links
 @param [Integer] slice -
 @param [Integer] period -