négligée vs undergarment

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. 

undergarment

noun
  • Temple garments worn by the followers of the Church of Jesus Christ of Latter-day Saints. 

  • Any garment worn underneath others, especially one worn next to the skin; an item of underwear. 

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