unfun vs unlucky

unfun

adj

  • Not fun. 

noun

  • Lack or absence of fun; funlessness. 

unlucky

adj

  • Inauspicious. 

  • Having ill luck. 

  • Bringing ill luck. 

  • Unfortunate, marked by misfortune. 

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