agitation vs anxiety

agitation

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

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

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

anxiety

noun
  • A state of restlessness and agitation, often accompanied by a distressing sense of oppression or tightness in the stomach. 

  • An unpleasant state of mental uneasiness, nervousness, apprehension and obsession or concern about some uncertain event. 

  • An uneasy or distressing desire (for something). 

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