elixir vs valerian

elixir

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

  • 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. 

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

valerian

noun
  • An extract of the dried roots of the Valeriana officinalis used in herbal medicine as a sedative. 

  • More generally, any plant of the genus Valeriana. 

  • A hardy perennial flowering plant, Valeriana officinalis, with heads of sweetly scented pink or white flowers. 

  • The root of Valeriana officinalis, used in herbal medicine. 

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