alchemy vs presage

alchemy

noun
  • The causing of any sort of mysterious sudden transmutation. 

  • Any elaborate transformation process or algorithm. 

  • 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. 

presage

noun
  • An intuition of a future event; a presentiment. 

  • A warning of a future event; an omen. 

verb
  • To make a prediction. 

  • To have a presentiment of; to feel beforehand; to foreknow. 

  • To predict or foretell something. 

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