cubbyhole vs small room

cubbyhole

noun
  • A small compartment; a pigeonhole 

  • A glove compartment 

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

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

small room

noun
  • Used other than figuratively or idiomatically: see small, room. 

  • A lavatory: a room intended for urination and defecation. 

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