jerkin vs pinafore

jerkin

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

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

pinafore

noun
  • A sleeveless dress, often similar to an apron, generally worn over other clothes, and most often worn by young girls as an overdress. 

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