garment vs underclothing

garment

noun
  • A single item of clothing. 

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

verb
  • To clothe in a garment. 

underclothing

noun
  • clothing worn next to the skin; underwear 

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