naan vs tortilla

naan

noun
  • A type of round, flat bread baked in a tandoor popular in South and Central Asian cuisine. 

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 naan and tortilla occurred in a corpus of books? (source: Google Ngram Viewer )