code: def rate_instance_hour_to_fraction_msec(rate_instance_hour, base):
      rate_instance_sec = rate_instance_hour / 3600
      rate_fraction_sec = rate_instance_sec / base
      return rate_fraction_sec * 0.001
  
label_desc: Use image node_id 4 for calling a global function with example usage: rate_instance_hour_to_fraction_msec(rate_instance_hour, base) and returns: unknown