abstractive vs dubious

abstractive

adj
  • Having an abstracting nature or tendency; tending to separate; tending to be withdrawn. 

  • Derived by abstraction; belonging to abstraction. 

dubious

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

  • Arousing doubt; questionable; open to suspicion. 

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

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