dentate vs knaggy

dentate

adj
  • Having teeth or toothlike projections; serrated, toothed. 

knaggy

adj
  • Having many protuberances, knobs or knots; knotty, rough or rugged. 

  • Temperamentally rough. 

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