break-off vs interjection

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 

interjection

noun
  • An interruption; something interjected 

  • An exclamation or filled pause; a word or phrase with no particular grammatical relation to a sentence, often an expression of emotion. 

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