agitator vs contrarian

agitator

noun
  • One who agitates; one who stirs up or excites others, for example political reformers. 

  • An implement for shaking or mixing. 

  • One of a body of men appointed by the army, in Oliver Cromwell's time, to look after their interests. 

contrarian

noun
  • A person who likes or tends to express a contradicting viewpoint, especially one who denounces the majority persuasion. 

  • A financial investor who tends to have an opinion of market trends at variance with most others. 

adj
  • Pertaining to or characteristic of a contrarian. 

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