kop vs loaf

kop

noun
  • A hill or mountain. 

loaf

noun
  • Shortened from "loaf of bread", the brain or the head (mainly in the phrase use one's loaf). 

  • A block of bread after baking. 

  • Any solid block of food, such as meat or sugar. 

  • A solid block of soap, from which standard bar soap is cut. 

verb
  • To headbutt (from loaf of bread) 

  • To be in catloaf position (for cats or other animals) 

  • To do nothing, to be idle. 

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