code: def reset_frequencies(self, frequency=0):
          
  
          frequency = max(frequency, 0)
  
          for key in self._store.keys():
              self._store[key] = (self._store[key][0], frequency)
  
          return frequency
docs: Resets all stored frequencies for the cache
  
          :keyword int frequency: Frequency to reset to, must be >= 0