providential vs unlucky

providential

adj
  • Fortunate, as if occurring through the intervention of Providence. 

  • Pertaining to divine providence. 

unlucky

adj
  • Bringing ill luck. 

  • Having ill luck. 

  • Inauspicious. 

  • Unfortunate, marked by misfortune. 

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