baby doll vs bedgown

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. 

bedgown

noun
  • An article of women's clothing for the upper body, usually thigh-length and wrapping or tying in front; a bedjacket. 

  • A nightgown. 

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