icebox vs refrigerator-freezer

icebox

noun
  • A compartment in a refrigerator that is colder than the rest of the refrigerator and is used as a freezer. 

  • A box or compartment containing ice, typically used to keep provisions cool. 

  • A prison. 

  • A morgue. 

adj
  • agreeable, awesome. (as a superlative of cool) 

refrigerator-freezer

noun
  • Synonym of fridge-freezer 

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