thermoregulator vs thermostat

thermoregulator

noun
  • A device that assists with thermoregulation, e.g. for a newborn infant. 

  • Any organism that carries out thermoregulation. 

thermostat

noun
  • A device that automatically responds to changes in temperature by activating a heating or cooling system to maintain the temperature at a desired setting. 

  • An algorithm used to maintain a simulated system at a set temperature by absorbing or releasing heat 

How often have the words thermoregulator and thermostat occurred in a corpus of books? (source: Google Ngram Viewer )