alchemy vs incantation

alchemy

noun
  • Any elaborate transformation process or algorithm. 

  • The causing of any sort of mysterious sudden transmutation. 

  • The premodern and early modern study of physical changes, particularly in Europe, Arabia, and China and chiefly in pursuit of an elixir of immortality, a universal panacea, and/or a philosopher's stone able to transmute base metals into gold, eventually developing into chemistry. 

incantation

noun
  • Any esoteric command or procedure. 

  • A formula of words used as above. 

  • The act or process of using formulas and/or usually rhyming words, sung or spoken, with occult ceremonies, for the purpose of raising spirits, producing enchantment, or creating other magical results. 

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