panacea vs placebo

panacea

noun
  • A remedy believed to cure all disease and prolong life that was originally sought by alchemists; a cure-all. 

  • A solution to all problems. 

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