factionalism vs political opposition

factionalism

noun
  • Conflict between factions. 

  • The splitting of a group into factions. 

political opposition

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

  • 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). 

  • 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. 

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