inconceivable vs nonreal

inconceivable

adj

  • Unable to be conceived or imagined; unbelievable. 

nonreal

adj

  • Not real; unreal, imaginary. 

  • Not real; not of the real numbers. 

noun

  • A nonreal number. 

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