dissent vs political opposition

dissent

noun
  • Disagreement with the ideas, doctrines, decrees, etc. of a political party, government or religion. 

  • An act of disagreeing with, or deviating from, the views and opinions of those holding authority. 

  • A violation that arises when disagreement with an official call is expressed in an inappropriate manner such as foul language, rude gestures, or failure to comply. 

  • A separate opinion filed in a case by judges who disagree with the outcome of the majority of the court in that case 

verb
  • To disagree; to withhold assent. Construed with from (or, formerly, to). 

  • To differ from, especially in opinion, beliefs, etc. 

political opposition

noun
  • Actions by one political group against another political group, either by using governmental power or by popular actions such as protests; generally, disagreement in politics. 

  • A recognized political party or group of parties in multiparty political systems that is present in Parliament or some other legislative body and does not control the floor (usually due to being in the minority). 

  • An unrecognized political party in a one-party state. 

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