untruthful vs unveracious

untruthful

adj
  • Not giving the truth; providing untrue facts; lying. 

  • Pertaining to falsehood; corrupt; dishonest. 

unveracious

adj
  • Not veracious; untruthful; false. 

  • Fake, imitation. 

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