break-off vs shattering

break-off

noun
  • That which breaks off, or is broken off 

  • A break, discontinuance, or interruption 

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

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

shattering

noun
  • The act of something that shatters; the shattered material. 

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