astonishingly vs phenomenally

astonishingly

adv
  • In an astonishing manner; so as to surprise or astonish. 

  • Very; remarkably used as an intensifier. 

phenomenally

adv
  • In a manner that is extraordinary or amazing. 

  • In terms of phenomena. 

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