milliner vs wardrobe mistress

milliner

noun
  • A person who is involved in the manufacture, design, or sale of hats for women. 

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 milliner and wardrobe mistress occurred in a corpus of books? (source: Google Ngram Viewer )