agitation vs staying power

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. 

staying power

noun
  • endurance, the ability to continue at something for a long period of time. 

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