dubious vs settled

dubious

adj
  • Arousing doubt; questionable; open to suspicion. 

  • In disbelief; wavering, uncertain, or hesitating in opinion; inclined to doubt; undecided. 

  • Generally considered imprecise or wrong, but not totally unplayable. 

settled

adj
  • Comfortable and at ease, especially after a period of change or unrest. 

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