discouraging vs unsettling

discouraging

adj

  • that causes discouragement 

noun

  • discouragement 

unsettling

adj

  • That makes one troubled or uneasy; disquieting or distressing. 

noun

  • The weakening of some previously established system or norm. 

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