concur vs rebel

concur

verb
  • To converge. 

  • To meet in the same point; to combine or conjoin; to contribute or help towards a common object or effect. 

  • To agree (in action or opinion); to have a common opinion; to coincide; to correspond. 

rebel

verb
  • To resist or become defiant toward an authority. 

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

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

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