disagreeable vs disheartening

disagreeable

adj
  • Causing repugnance; unpleasant to the feelings or senses; displeasing. 

noun
  • Something or someone displeasing; anything that is disagreeable. 

disheartening

adj
  • Causing a person to lose heart; making despondent or gloomy. 

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