big house vs stately home

big house

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

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

  • Prison, jail. 

stately home

noun
  • Synonym of country house, especially one owned by the aristocracy 

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