bologna vs knackwurst

bologna

noun
  • A seasoned Italian sausage made from beef, pork or veal. 

  • Synonym of baloney (nonsense). 

knackwurst

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

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