elixir vs selfheal

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. 

selfheal

noun
  • Especially, Prunella vulgaris. 

  • A small, herbaceous European plant with blue-violet flowers from any species of genus Prunella. 

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