break-off vs breathing spell

break-off

noun
  • A break, discontinuance, or interruption 

  • That which breaks off, or is broken off 

  • The first shot in a game of snooker or other cue-game 

verb
  • To play the first shot in a game of snooker 

breathing spell

noun
  • An opportunity to rest or give thought to a situation; a short respite. 

How often have the words break-off and breathing spell occurred in a corpus of books? (source: Google Ngram Viewer )