dosa vs flapjack

dosa

noun
  • A type of thin south Indian pancake made from fermented lentils and rice blended with water, typically served with chutney or sambar. 

flapjack

noun
  • A pancake. 

  • A bar made of (though not limited to) rolled oats, butter, golden syrup, and brown sugar, baked in a tray. 

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