pharmacist's vs pharmacy

pharmacist's

pharmacy

noun
  • The science of medicinal substances, inclusive of pharmaceutics, pharmaceutical chemistry, pharmacology, phytochemistry, and forensics. 

  • The role or occupation of a pharmacist. 

  • A place where prescription drugs are sold or dispensed. 

How often have the words pharmacist's and pharmacy occurred in a corpus of books? (source: Google Ngram Viewer )