big house vs penitentiary

big house

noun
  • Prison, jail. 

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

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

penitentiary

noun
  • A state or federal prison for convicted felons; (broadly) a prison. 

  • A priest in the Roman Catholic Church who administers the sacrament of penance. 

adj
  • Of or relating to penance; penitential. 

  • Of or relating to the punishment of criminals. 

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