medicinal vs pharmacology

medicinal

noun
  • Any plant that can be used for medicinal purposes. 

adj
  • Having the properties of medicine, or pertaining to medicine; medical. 

  • Tasting like medicine; particularly of unpleasant or artificial sweet or bitter flavours similar to cherry, almond or licorice. 

  • Tending or used to cure disease or relieve pain. 

pharmacology

noun
  • The science of drugs including their origin, composition, pharmacokinetics, therapeutic use, and toxicology. 

  • The properties and reactions of drugs especially with relation to their therapeutic value. 

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