sackcloth vs tenting

sackcloth

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

  • Garments worn as an act of penance. 

adj
  • Made of sackcloth. 

tenting

noun
  • Material used for making tents. 

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