discouraging vs threatening

discouraging

noun
  • discouragement 

adj
  • that causes discouragement 

threatening

noun
  • An act of threatening; a threat. 

adj
  • Presenting a threat, posing a likely risk of harm. 

  • Making threats, making statements about a willingness to cause harm. 

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