dispensary vs pharmacology

dispensary

noun
  • A retail establishment that sells marijuana and related supplies to customers with a prescription to use it for medical purposes. 

  • An institution that dispenses medical supplies and advice. 

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 dispensary and pharmacology occurred in a corpus of books? (source: Google Ngram Viewer )