blind alley vs miracle

blind alley

noun
  • A course of inquiry that leads nowhere. 

  • Used other than figuratively or idiomatically: see blind, alley. A street or passageway that leads nowhere. 

miracle

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

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. 

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