cubbyhole vs torture chamber

cubbyhole

noun
  • A small, snug room which may be used as a place of privacy and safety by children 

  • A glove compartment 

  • A small compartment; a pigeonhole 

verb
  • To restrict, limit or narrowly define; to pigeonhole. 

torture chamber

noun
  • A room equipped for carrying out torture. 

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