dressing gown vs négligée

dressing gown

noun
  • An item of clothing often made from cotton or another absorbent material, in the form of a long open robe with a belt to tie it around the middle and fasten it securely; often worn over pyjamas. 

négligée

noun
  • A necklace of beads, pearls etc. 

  • A woman's loose-fitting nightgown, especially when short, lacy and/or revealing; a nightie. 

adj
  • In the style of a negligee; revealing, titillating. 

How often have the words dressing gown and négligée occurred in a corpus of books? (source: Google Ngram Viewer )