bannock vs doughboy

bannock

noun
  • A biscuit bread made of wheat flour or cornmeal, fat, and sometimes baking powder, typically baked over a fire, wrapped around a stick or in a pan. 

  • An unleavened bread made with barley, wheat, or oatmeal. 

doughboy

noun
  • Frybread. 

  • An American infantryman, especially one from World War I. 

  • A kind of flour dumpling. 

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