cough drop vs elixir

cough drop

noun
  • A small, medicated tablet intended to be dissolved slowly in the mouth to relieve coughing symptoms temporarily. 

elixir

noun
  • 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. 

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

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