unfavourable vs unfun

unfavourable

adj
  • Not auspicious; ill-boding. 

  • Of wind or weather: causing delay or obstacles; not conducive to travel or work; inclement. 

  • Serving to hinder or oppose; adverse, disadvantageous, inconducive, unsuitable. 

  • Of a belief, state of mind, etc.: not favourable; disapproving. 

unfun

adj
  • Not fun. 

noun
  • Lack or absence of fun; funlessness. 

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