dishonorable vs redoubtable

dishonorable

adj
  • Without honor, or causing dishonor. 

  • Lacking respect for ethical principles. 

redoubtable

adj
  • Eliciting respect or fear; imposing; awe-inspiring. 

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