dread vs terror

dread

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

  • A Rastafarian. 

  • Somebody or something dreaded. 

  • Reverential or respectful fear; awe. 

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. 

terror

noun
  • Intense dread, fright, or fear. 

  • The action or quality of causing dread; terribleness, especially such qualities in narrative fiction. 

  • A night terror. 

  • Terrorism. 

  • Something or someone that causes such fear. 

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