betrap vs snarl up

betrap

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

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

snarl up

verb
  • To become tangled; to become entangled 

  • to become congested. 

  • to entangle 

  • To block (traffic); to cause (traffic) to be congested. 

  • To put into disarray; contort; confuse; muddle up 

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