Druid vs alchemist

Druid

noun
  • A member of a benefit society founded in 1781, the Ancient Order of Druids. 

alchemist

noun
  • One who practices alchemy. 

  • One who blends material or substances in the nature or supposed nature of alchemy. 

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