croissant vs tortilla

croissant

noun
  • A flaky roll or pastry in a form of a crescent. 

tortilla

noun
  • A flat round bread made out of cornmeal or flour. 

  • Spanish omelette; an omelette containing potatoes and onions. 

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