affiance vs break off

affiance

noun
  • Faith, trust. 

verb
  • To be betrothed to; to promise to marry. 

break off

verb
  • To end abruptly, either temporarily or permanently. 

  • To end a relationship. 

  • To remove a piece from a whole by breaking or snapping 

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