code: def suggest_freq(self, segment, tune=False):
          
          self.check_initialized()
          ftotal = float(self.total)
          freq = 1
          if isinstance(segment, string_types):
              word = segment
              for seg in self.cut(word, HMM=False):
                  freq *= self.FREQ.get(seg, 1) / ftotal
              freq = max(int(freq * self.total) + 1, self.FREQ.get(word, 1))
          else:
              segment = tuple(map(strdecode, segment))
              word = ''.join(segment)
              for seg in segment:
                  freq *= self.FREQ.get(seg, 1) / ftotal
              freq = min(int(freq * self.total), self.FREQ.get(word, 0))
          if tune:
              add_word(word, freq)
          return freq
docs: Suggest word frequency to force the characters in a word to be
          joined or splitted.
  
          Parameter:
              - segment : The segments that the word is expected to be cut into,
                          If the word should be treated as a whole, use a str.
              - tune : If True, tune the word frequency.
  
          Note that HMM may affect the final result. If the result doesn't change,
          set HMM=False.