bread and butter vs naan

bread and butter

noun
  • Used other than figuratively or idiomatically: see bread, butter. 

  • That which is central or fundamental, as to one's business, survival, or income; a staple or cornerstone. 

intj
  • Said when two people walking together are temporarily separated by an obstacle in order to indicate that they belong together. 

naan

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

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