pen in vs shut off

pen in

verb
  • To schedule; fix a date for. 

  • To enclose (animals) in a pen. 

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

shut off

verb
  • To stop or turn off. 

  • To separate; to isolate. 

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