garment vs underclothes

garment

noun
  • A single item of clothing. 

  • The visible exterior in which a thing is invested or embodied. 

verb
  • To clothe in a garment. 

underclothes

noun
  • clothes worn next to the skin and underneath outer clothing 

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