sensibly vs unthinkably

sensibly

adv
  • In a way that can be sensed or noticed; perceptibly. 

  • In a sensible manner; in a way that shows good sense. 

unthinkably

adv
  • In an unthinkable manner. 

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