fritz vs go south

fritz

verb
  • To go wrong or become defective. 

noun
  • A type of processed meat sausage; devon 

  • The state of being defective. 

go south

verb
  • To become unfavorable; to decrease; to take a turn for the worse. 

  • To make an escape; to disappear. 

  • To give somebody oral sex. 

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