inutterable vs unlucky

inutterable

adj

  • Unutterable; inexpressible. 

unlucky

adj

  • Inauspicious. 

  • Having ill luck. 

  • Bringing ill luck. 

  • Unfortunate, marked by misfortune. 

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