dread vs heroism

dread

adj
  • Terrible; greatly feared; dreaded. 

verb
  • To be in dread, or great fear. 

  • To style (the hair) into dreadlocks. 

  • To fear greatly. 

  • To anticipate with fear. 

noun
  • A Rastafarian. 

  • Great fear in view of impending evil; fearful apprehension of danger; anticipatory terror. 

  • Somebody or something dreaded. 

  • Reverential or respectful fear; awe. 

heroism

noun
  • The qualities characteristic of a hero, such as courage, bravery, fortitude, selflessness, etc.; the display of such qualities. 

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