reality vs untruth

reality

noun
  • The state of being actual or real; realness. 

  • The entirety of all that is real. 

  • The real world. 

  • An individual observer's own subjective perception of that which is real. 

  • A real entity, event, or other fact. 

untruth

noun
  • The condition of being false; truthlessness. 

  • A lie or falsehood. 

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