baby doll vs nightwear

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. 

nightwear

noun
  • Clothes worn at nighttime or in bed, such as pyjamas 

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