discomfort vs unhappiness

discomfort

noun
  • Mental or bodily distress. 

  • Something that disturbs one’s comfort; an annoyance. 

verb
  • To cause annoyance or distress to. 

unhappiness

noun
  • The feeling of not being happy 

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