panic button vs skittle

panic button

noun
  • An emergency button which, when pressed, alerts authorities of danger or triggers an alarm system. 

skittle

noun
  • One of the wooden targets used in skittles. 

verb
  • To knock down (skittles). 

  • To defeat easily. 

  • (sometimes with out) To rapidly bowl out a succession of batsmen. 

  • To play skittles. 

  • (with down) To squander one's money. 

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