big house vs reformatory

big house

noun
  • Prison, jail. 

  • Used other than figuratively or idiomatically: see big, house. 

  • A religious building of the Delaware Indians, representing the cosmos. 

reformatory

noun
  • A prison, especially one for juveniles; a reform school. 

adj
  • Of, pertaining to, or conducive to reform; reformative. 

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