gruff vs perversive

gruff

adj
  • having a rough, surly, and harsh demeanor and nature. 

  • Of goods: bulky. 

  • hoarse-voiced. 

verb
  • To speak gruffly. 

perversive

adj
  • Tending to pervert. 

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