betrap vs decoy

betrap

verb
  • To catch in a trap; entrap; ensnare; enclose. 

  • To furnish (a horse) with trappings; deck; adorn. 

decoy

verb
  • To lead into danger by artifice; to lure into a net or snare; to entrap. 

  • To act as, or use, a decoy. 

noun
  • A real or fake animal used by hunters to lure game. 

  • A person or object meant to lure somebody into danger. 

  • Deceptive military device used to draw enemy attention or fire away from a more important target. 

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