jerkin vs waistcoat

jerkin

noun
  • A sleeveless jacket, usually leather; a long waistcoat. 

  • A type of men's garment popular in the sixteenth and seventeenth centuries: a close-fitting collarless jacket, with or without sleeves. 

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