cautioning vs daunting

cautioning

noun
  • The act of giving a warning. 

daunting

noun
  • The act of discouraging or intimidating; discouragement, intimidation. 

  • The act of defeating, overcoming, or overwhelming. 

adj
  • Appearing to be difficult; challenging. 

  • Intimidatingly impressive; awe-inspiring, overwhelming. 

  • Discouraging; inspiring fear. 

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