act up vs fritz

act up

verb
  • To misbehave; to cause trouble. 

  • To perform the duties of an appointment senior to that actually held; to deputise for a superior. 

fritz

verb
  • To go wrong or become defective. 

noun
  • A type of processed meat sausage; devon 

  • The state of being defective. 

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