baby doll vs nightdress

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. 

nightdress

noun
  • A nightgown; female attire designed to be worn to bed. 

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