horror vs trepidation

horror

noun
  • An intense distressing emotion of fear or repugnance. 

  • A genre of fiction designed to evoke a feeling of fear and suspense. 

  • An individual work in this genre. 

  • Delirium tremens. 

  • A nasty or ill-behaved person; a rascal or terror. 

  • Intense dislike or aversion; an abhorrence. 

  • Something horrible; that which excites horror. 

  • An intense anxiety or a nervous depression; often the horrors. 

trepidation

noun
  • A fearful state; a state of concern or hesitation. 

  • An involuntary trembling, sometimes an effect of paralysis, but usually caused by terror or fear. 

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