betrap vs dragnet

betrap

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

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

dragnet

verb
  • To make heightened efforts to catch a suspect. 

  • To drag a net across the bottom of a body of water. 

noun
  • Heightened efforts by law-enforcement personnel to capture suspects. 

  • A net dragged across the bottom of a body of water. 

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