brave vs unreliable

brave

adj
  • Foolish or unwise. 

  • Strong in the face of fear; courageous. 

  • Making a fine show or display. 

verb
  • After braving tricks on the high-dive, he braved a jump off the first diving platform. 

  • To encounter with courage and fortitude, to defy, to provoke. 

unreliable

adj
  • Not reliable. 

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