knackwurst vs pizzle

knackwurst

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

pizzle

noun
  • A baton made from the penis of an ox, once used to beat men and animals. 

  • The penis of an animal. 

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