insulting vs irksome

insulting

adj
  • Containing insult, or having the intention of insulting. 

noun
  • The act of giving insult. 

irksome

adj
  • Marked by irritation or annoyance; disagreeable; troublesome by reason of long continuance or repetition 

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