phobia vs terror

phobia

noun
  • An irrational, abnormal, or obsessive fear (of something). 

terror

noun
  • Something or someone that causes such fear. 

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

  • Intense dread, fright, or fear. 

  • A night terror. 

  • Terrorism. 

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