alchemy vs obi

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. 

obi

noun
  • A sash worn with a kimono. 

  • A strip of paper looped around a book or other product. 

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