documentary vs truthful

documentary

adj
  • Presented objectively without the insertion of fictional matter. 

  • Of, related to, or based on documents. 

  • Which serves to document (record and:or illustrate) a subject. 

noun
  • A film, TV program, publication etc. which presents a social, political, scientific or historical subject in a factual or informative manner. 

truthful

adj
  • Accurately depicting what is real. 

  • Honest, and always telling the truth. 

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