optimistic vs perverse

optimistic

adj
  • Expecting the best in all possible ways. 

  • Allowing other processes to perform transactions on the same data at the same time, and checking for conflicts only when changes need to be written back. 

perverse

adj
  • Morally wrong or evil; wicked; perverted. 

  • Obstinately in the wrong; stubborn; intractable. 

  • Turned aside while against something, splitting off from a thing. 

  • Ignoring the evidence or the judge's opinions. 

  • Wayward; vexing; contrary. 

verb
  • To pervert. 

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