firebrand vs rebel

firebrand

noun
  • An argumentative troublemaker or revolutionary; one who agitates against the status quo. 

  • A torch or other burning stick with a flame at one end. 

rebel

noun
  • A person who resists an established authority, often violently. 

  • Synonym of Confederate: a citizen of the Confederate States of America, especially a Confederate soldier. 

verb
  • To resist or become defiant toward an authority. 

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