dismal vs inoperational

dismal

adj

  • Disappointingly inadequate. 

  • Causing despair; gloomy and bleak. 

  • Depressing, dreary, cheerless. 

  • Disastrous, calamitous 

inoperational

adj

  • Not operational. 

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