heal-all vs placebo

heal-all

noun
  • A remedy for all diseases. 

  • A small, herbaceous European plant with blue-violet flowers; Prunella vulgaris. 

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