crash and burn vs go down the toilet

crash and burn

verb

  • To fail utterly. 

go down the toilet

verb

  • To fail. 

  • Used other than figuratively or idiomatically: see go, down, the, toilet. 

  • To degenerate rapidly. 

How often have the words crash and burn and go down the toilet occurred in a corpus of books? (source: Google Ngram Viewer )