stroke of ill luck vs tragedy

stroke of ill luck

tragedy

noun
  • A drama or similar work, in which the main character is brought to ruin or otherwise suffers the extreme consequences of some tragic flaw or weakness of character. 

  • The genre of such works, and the art of producing them. 

  • A disastrous event, especially one involving great loss of life or injury. 

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