elixir vs placebo

elixir

noun
  • The alleged cure for all ailments; cure-all, panacea. 

  • A sweet flavored liquid (usually containing a small amount of alcohol) used in compounding medicines to be taken by mouth in order to mask an unpleasant taste. 

  • A liquid which converts lead to gold. 

  • A substance or liquid which is believed to cure all ills and give eternal life. 

placebo

noun
  • A dummy medicine containing no active ingredients; an inert treatment. 

  • The vespers sung in the office for the dead. 

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