improbably vs unequivocally

improbably

adv
  • In an improbable manner; without probability. 

unequivocally

adv
  • In a way that leaves no doubt; in an unequivocal or unambiguous manner, unquestionably. 

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