nonpositive vs unfun

nonpositive

adj

  • Not positive. 

  • Not positive; either zero or negative. 

noun

  • Any value that is not positive. 

unfun

adj

  • Not fun. 

noun

  • Lack or absence of fun; funlessness. 

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