missionary vs reformer

missionary

noun
  • A religious messenger. 

  • Sexual intercourse in the missionary position. 

  • The missionary position for sexual intercourse. 

  • One who is sent on a mission. 

  • A person who travels attempting to spread a religion or creed. 

adj
  • Relating to a (religious) mission. 

reformer

noun
  • One who was involved in the Reformation. 

  • One who reforms, or who works for reform. 

  • 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 missionary and reformer occurred in a corpus of books? (source: Google Ngram Viewer )