code: def ft_suglen (attribute:)
        key = "#{@model}:#{attribute}"
        REDI_SEARCH.call('FT.SUGLEN', key)
      rescue Exception => e
        Rails.logger.error e if defined? Rails
        return e.message
      end
docs: size of dictionary
  
   @param attribute [String]
   @return [Integer] - number of possible suggestions