convector vs cooker

convector

noun
  • A space heater that transfers heat by convection; a radiator 

cooker

noun
  • A device for heating food, a stove. 

  • A person who is cooked; a crazy person. 

  • A person who makes or uses illicit drugs, especially methamphetamine or cannabis. 

  • An appliance or utensil for cooking food. 

  • A cooking apple. 

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