crabby vs discursory

crabby

adj
  • Visibly irritated or annoyed; grouchy, irritable, in a foul mood; given to complaining or finding fault in an annoyed way. 

  • crabbed; difficult, or perplexing. 

discursory

adj
  • argumentative; discursive; reasoning 

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