nostrum vs placebo

nostrum

noun
  • A medicine or remedy in conventional use which has not been proven to have any desirable medical effects. 

  • An ineffective but favorite remedy for a problem, usually involving political action. 

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 nostrum and placebo occurred in a corpus of books? (source: Google Ngram Viewer )