alchemy vs magnetism

alchemy

noun
  • 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. 

  • Any elaborate transformation process or algorithm. 

  • The causing of any sort of mysterious sudden transmutation. 

magnetism

noun
  • The science which treats of magnetic phenomena. 

  • The property of being magnetic. 

  • Animal magnetism. 

  • Power of attraction; power to excite the feelings and to gain the affections. 

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