chiller vs refrigerator

chiller

noun
  • A machine that removes heat from the working fluid in a refrigeration cycle 

  • A frightening dramatic work, such as a book or film 

  • a heat exchanger between a coolant and a refrigerant, to transfer heat from the coolant loop into the refrigeration system 

  • a machine that produces cold air, either for air conditioning, to prepare chilled foods etc. 

refrigerator

noun
  • A household appliance used for keeping food fresh by refrigeration (short form fridge). 

  • One who has a chilling influence. 

  • A similar device used to keep non-food items cold, such as blood, photographic film, drugs, or pharmaceuticals like insulin. 

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