knackwurst vs meatball

knackwurst

noun
  • A highly seasoned scalded sausage made from beef, pork, and fatty tissue similar to a frankfurter, but shorter and thicker. 

meatball

noun
  • A ball of minced or ground meat, seasoned and cooked. 

  • A stupid person; a meathead. 

  • An optical landing system. 

  • An easy pitch to hit, especially thrown right down the middle of the plate. 

  • A menu icon of three horizontal dots. 

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