luck of the draw vs raffle

luck of the draw

noun
  • The random production of favorable or unfavorable results; chance. 

raffle

noun
  • A drawing, often held as a fundraiser, in which tickets or chances are sold to win a prize. 

  • refuse; rubbish 

verb
  • To participate in a raffle. 

  • To award something by means of a raffle or random drawing, often used with off. 

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