code: def setPWMFrequency(self, pwm, device=DEFAULT_DEVICE_ID, message=True):
          
          return self._setPWMFrequency(pwm, device, message)
docs: Set the PWM frequency.
  
          :Parameters:
            pwm : `int`
              The PWN frequency to set in hertz.
  
          :Keywords:
            device : `int`
              The device is the integer number of the hardware devices ID and
              is only used with the Pololu Protocol. Defaults to the hardware's
              default value.
            message : `bool`
              If set to `True` a text message will be returned, if set to `False`
              the integer stored in the Qik will be returned.
  
          :Returns:
            A text message or an int. See the `message` parameter above.
  
          :Exceptions:
            * `SerialException`
              IO error indicating there was a problem reading from the serial
              connection.