speculative vs untroubled

speculative

adj
  • Pursued as a gamble, with possible large profits or losses; risky. 

  • Pertaining to financial speculation; Involving or resulting from high-risk investments or trade. 

  • Characterized by speculation; based on guessing, unfounded opinions, or extrapolation. 

untroubled

adj
  • Without worries; free from care. 

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