break-off vs breaking

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 

breaking

noun
  • The act by which something is broken. 

  • A change of a vowel to a diphthong. 

  • A form of ornamentation in which groups of short notes are used instead of long ones. 

  • Breakdancing. 

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