truthful vs venal

truthful

adj
  • Honest, and always telling the truth. 

  • Accurately depicting what is real. 

venal

adj
  • Capable of being bought (of a person); willing to take bribes. 

  • Of a position, privilege etc.: available for purchase rather than assigned on merit. 

  • Venous; pertaining to veins. 

  • Corrupt, mercenary. 

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