misfire vs peter out

misfire

verb
  • To fail to achieve the anticipated result. 

  • To fail to ignite in the proper sequence. 

  • To fail to discharge properly. 

noun
  • An act of misfiring. 

peter out

verb
  • Synonym of peter (“originally (mining), of a vein of ore: to be depleted of ore; now (generally), to diminish to nothing; to dwindle, to trail off”) 

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