gunny vs sackcloth

gunny

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

  • A gunny sack. 

  • A gunnery sergeant. 

sackcloth

noun
  • A coarse hessian style of cloth used to make sacks. 

  • Garments worn as an act of penance. 

adj
  • Made of sackcloth. 

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