betrap vs entrap

betrap

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

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

entrap

verb
  • To catch in a trap or snare. 

  • To lure (someone), either into a dangerous situation, or into performing an illegal act. 

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