dumb luck vs joy

dumb luck

noun
  • pure chance; luck 

joy

noun
  • Luck or success; a positive outcome. 

  • Anything that causes such a feeling. 

  • A feeling of extreme happiness or cheerfulness, especially related to the acquisition or expectation of something good. 

verb
  • To feel joy, to rejoice. 

How often have the words dumb luck and joy occurred in a corpus of books? (source: Google Ngram Viewer )