inappropo vs unlucky

inappropo

adj

  • Inappropriate. 

  • Not apropos. 

unlucky

adj

  • Inauspicious. 

  • Having ill luck. 

  • Bringing ill luck. 

  • Unfortunate, marked by misfortune. 

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