négligée vs undershirt

négligée

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

  • A necklace of beads, pearls etc. 

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

undershirt

noun
  • An undergarment worn beneath a shirt, often collarless and sleeveless. 

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