Bluey vs firebox

Bluey

name
  • A nickname commonly given to a red-headed person. 

firebox

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

  • A redheaded woman or her red pubic hair. 

  • 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 )