gambeson vs hauberk

gambeson

noun
  • A defensive garment formerly in use for the body, made of cloth stuffed and quilted, often worn as padding under armor. 

hauberk

noun
  • A similar shirt of scale mail, plate, leather, or other armor material. 

  • A coat of mail; especially, the long coat of mail of the European Middle Ages, as contrasted with the habergeon, which is shorter and sometimes sleeveless. 

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