encouraging vs spine-chilling

encouraging

noun

  • encouragement 

adj

  • supporting by giving encouragement 

  • giving courage, confidence or hope 

  • auspicious, or bringing good luck 

spine-chilling

adj

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

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