gilet vs waistcoat

gilet

noun
  • A sleeveless jacket resembling a waistcoat but generally closed at the neck; specifically, one which is padded to provide warmth. 

  • A bodice worn by a woman similar to a man's waistcoat; also, a decorative panel at the front of such a bodice, or worn separately. 

  • A waistcoat worn by a man. 

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 gilet and waistcoat occurred in a corpus of books? (source: Google Ngram Viewer )