baby doll vs peignoir

baby doll

noun
  • A style of women's nightdress. 

  • A young attractive woman; sweetheart, darling. 

  • A child's doll designed to look like a baby. 

peignoir

noun
  • A long outer garment for women, usually sheer and made of chiffon and often sold with matching nightgown, negligee or underwear 

  • A cape worn to protect the clothes at the barbers / hairdressers 

How often have the words baby doll and peignoir occurred in a corpus of books? (source: Google Ngram Viewer )