agitate vs muss

agitate

verb
  • To disturb or excite; to perturb or stir up (a person). 

  • To cause to move with a violent, irregular action; to shake. 

muss

verb
  • To rumple, tousle or make (something) untidy. 

noun
  • A mess (disagreeable mixture or confusion of things; disorder) 

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