leftover vs potato crisp

leftover

noun
  • Remaining after a meal is complete or eaten for a later meal or snack. 

  • Something left behind; an excess or remainder. 

adj
  • Remaining; left behind; extra; in reserve. 

potato crisp

noun
  • A thin slice of potato that has been fried, typically packaged and sold as a snack. 

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