too bad vs unlucky

too bad

phrase
  • It is unfortunate that. 

  • That's a pity; that's unfortunate. 

unlucky

adj
  • Having ill luck. 

  • Inauspicious. 

  • Bringing ill luck. 

  • Unfortunate, marked by misfortune. 

How often have the words too bad and unlucky occurred in a corpus of books? (source: Google Ngram Viewer )