gingernut vs ranga

gingernut

noun
  • A redhead; a ginger-haired person. 

  • A hard biscuit, flavoured with powdered ginger, often dunked in tea. 

ranga

noun
  • An orange-haired or red-haired person. 

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