bluey vs firebox

bluey

noun
  • A person with red hair. 

  • The metal lead. 

  • A bluebottle. 

  • A bushman's blanket. 

  • A disposable underpad. 

  • A collection of clothes and other belongings rolled up into a bundle for carrying; a swag. 

  • A blue film. 

  • A blue singlet, especially one from the Bonds clothing label. 

  • A blue cattle dog, especially a blue heeler. 

adj
  • Having a colour similar to blue. 

firebox

noun
  • A redheaded woman or her red pubic hair. 

  • The part of a fireplace where the fuel is burned. 

  • The chamber of a steam engine, or a steam locomotive, in which the fuel is burned. 

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