pharmaceutical vs placebo

pharmaceutical

noun
  • A pharmaceutical or pharmacological preparation or product; a drug. 

adj
  • Of, or relating to pharmacy or pharmacists. 

placebo

noun
  • A dummy medicine containing no active ingredients; an inert treatment. 

  • The vespers sung in the office for the dead. 

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