latke vs slapjack

latke

noun
  • A pancake fried in oil, usually made from potatoes and sometimes also onions, traditionally served on Hanukkah. 

slapjack

noun
  • A type of pancake, or flapjack. 

  • A simple card game similar to snap. 

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