camera vs torture chamber

camera

noun
  • A vaulted room. 

  • The viewpoint in a three-dimensional game or simulation. 

  • A judge's private chamber, where cases may be heard in camera. 

  • A device for taking still or moving pictures or photographs. 

torture chamber

noun
  • A room equipped for carrying out torture. 

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