agitation vs disquietude

agitation

noun
  • A disturbance of personal tranquillity; disturbance of someone's peace of mind. 

  • Excitement of public feeling by discussion, appeals, etc. 

  • The act of agitating, or the state of being agitated; the state of being disrupted with violence, or with irregular action; commotion. 

disquietude

noun
  • A state of disquiet, uneasiness, or anxiety. 

  • A fear or an instance of uneasiness. 

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