agitation vs angst

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. 

angst

noun
  • Emotional turmoil; painful sadness. 

  • A feeling of acute but vague anxiety or apprehension often accompanied by depression, especially philosophical anxiety. 

verb
  • To suffer angst; to fret. 

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