cloakroom attendant vs dressing room

cloakroom attendant

noun
  • A person who works in a cloakroom (a room intended for holding guests' cloaks and other heavy outerwear, as at a theater or night club). 

dressing room

noun
  • A room in a theatre or other performance venue in which performers may change costumes and apply makeup. 

  • A room used for dressing or changing clothes. 

  • A changing room at a recreational or sports venue. 

  • A small room adjoining a domestic bedroom where people may dress or undress in privacy. 

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