irk vs miff

irk

verb
  • to irritate; annoy; bother 

miff

verb
  • To become slightly offended. 

  • To offend slightly. 

noun
  • A state of being offended. 

  • A small argument; a quarrel. 

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