disagreeable vs irksome

disagreeable

adj
  • Causing repugnance; unpleasant to the feelings or senses; displeasing. 

noun
  • Something or someone displeasing; anything that is disagreeable. 

irksome

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

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