couturier vs wardrobe mistress

couturier

noun
  • A person who designs haute couture (high fashion). 

  • A company that is owned by or employs such a person; a fashion house. 

wardrobe mistress

noun
  • A woman in charge of the procurement, maintenance, and inventory of the costumes and other clothing worn by performers. 

How often have the words couturier and wardrobe mistress occurred in a corpus of books? (source: Google Ngram Viewer )