centrist vs reactionary

centrist

adj
  • Of, pertaining to, or advocating centrism. 

noun
  • A person who advocates centrism. 

reactionary

adj
  • Of, pertaining to, participating in, or inducing a chemical reaction. 

  • In reaction to; as a result of. 

  • Favoring a return to an alleged, mythical golden age of the past; anti-progressive. 

noun
  • One who is opposed to progress and change and wants to reverse it, wishing for a return to an alleged, mythical golden age of the past. 

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