ladies' cloakroom vs little girls' room

ladies' cloakroom

noun
  • A cloakroom intended for use by women. 

little girls' room

noun
  • Synonym of ladies' room: a public lavatory intended for use by women. 

  • A room belonging to or used by little girls, particularly their bedroom. 

How often have the words ladies' cloakroom and little girls' room occurred in a corpus of books? (source: Google Ngram Viewer )