gingernut vs gingersnap

gingernut

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

  • A redhead; a ginger-haired person. 

gingersnap

noun
  • A type of biscuit (American: cookie) made from dough seasoned with ginger. 

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