infelicitous vs unfun

infelicitous

adj
  • Inappropriate or awkward; not well said, expressed, or done. 

  • Of a sentence or utterance: not semantically and pragmatically coherent. 

  • Unhappy or unfortunate. 

unfun

adj
  • Not fun. 

noun
  • Lack or absence of fun; funlessness. 

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