untroubled vs upsetting

untroubled

adj
  • Without worries; free from care. 

upsetting

noun
  • The action of the verb upset. 

adj
  • Causing upset; distressing. 

  • Conceited; presumptuous. 

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