feeble vs redoubtable

feeble

adj
  • Lacking force, vigor, or effectiveness in action or expression; faint. 

  • Deficient in physical strength. 

redoubtable

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

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