box in vs pen in

box in

verb
  • To enclose by drawing a box around. 

  • To limit someone's freedom of thought, movement, expression, etc. 

  • To trap or immobilize something, usually a vehicle, by placing obstacles, usually other vehicles, around it to obstruct its free movement. 

pen in

verb
  • To enclose (animals) in a pen. 

  • To schedule; fix a date for. 

  • To cause to be stuck in a situation; to be forced into a situation by circumstances. 

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