bitter pill vs miracle

bitter pill

noun
  • Used other than figuratively or idiomatically: see bitter, pill. 

miracle

noun
  • A fortunate outcome that prevails despite overwhelming odds against it. 

  • An awesome and exceptional example of something 

  • An event that appears inexplicable by the laws of nature and so is held to be supernatural in origin. 

verb
  • To affect by a miracle; to work a miracle upon. 

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