gunny vs hopsack

gunny

noun
  • A coarse heavy fabric made of jute or hemp. 

  • A gunny sack. 

  • A gunnery sergeant. 

hopsack

noun
  • A coarse, loosely-woven clothing fabric. 

  • A hemp sack used for holding hops. 

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