grim vs spine-chilling

grim

adj
  • Ghastly or sinister. 

  • Rigid and unrelenting. 

  • Disgusting; gross. 

  • Dismal and gloomy, cold and forbidding. 

verb
  • To make grim; to give a stern or forbidding aspect to. 

spine-chilling

adj
  • Inducing fear or nervousness; frequently used of a work of fiction. 

How often have the words grim and spine-chilling occurred in a corpus of books? (source: Google Ngram Viewer )