counterfactual vs unreal

counterfactual

adj
  • Contrary to known or agreed facts; untrue. 

  • Of or in comparison to a hypothetical state of the world. 

noun
  • A conditional statement in which the conditional clause is false. 

  • A claim, hypothesis, or other belief that is contrary to the facts. 

  • A hypothetical state of the world, used to assess the impact of an action. 

unreal

adj
  • Not real or substantial; having no actual presence in reality; lacking the characteristics of reality. 

  • very impressive; amazing; unbelievable; incredible; larger or more fantastic than typical of real life. 

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