meliorist vs reformer

meliorist

noun
  • A proponent of meliorism 

adj
  • Of or relating to meliorism. 

  • Supporting the principles of meliorism. 

reformer

noun
  • One who reforms, or who works for reform. 

  • One who was involved in the Reformation. 

  • A device used to convert petroleum refinery naphthas, typically having low octane ratings, into high-octane liquid products called reformates. 

  • A device which converts hydrocarbons into a hydrogen-rich mixture of gases. 

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