garment vs waistcoat

garment

noun
  • A single item of clothing. 

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

verb
  • To clothe in a garment. 

waistcoat

noun
  • A sleeveless, collarless garment worn over a shirt and under a suit jacket. 

  • An ornamental garment worn under a doublet. 

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