agitate vs disquiet

agitate

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

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

disquiet

verb
  • To make (someone or something) worried or anxious. 

noun
  • Lack of quiet; absence of tranquility in body or mind 

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