exclamation vs nightmare

exclamation

noun
  • A loud calling or crying out, for example as in surprise, pain, grief, joy, anger, etc. 

  • A clause type used to make an exclamatory statement: What a mess they made!; How stupid I was! 

  • The sign "!" by which outcry or emphatic utterance is marked. 

  • A word expressing outcry; an interjection 

nightmare

noun
  • Any bad, miserable, difficult or terrifying situation or experience that arouses anxiety, terror, agony or great displeasure. 

  • A very bad or frightening dream. 

  • A feeling of extreme anxiety or suffocation experienced during sleep; Sleep paralysis. 

verb
  • To have a nightmare. 

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