diametrically vs mightily

diametrically

adv
  • Absolutely (in opposition). 

  • Separated by a diameter, on exactly the opposite side. 

mightily

adv
  • Thoroughly; entirely. 

  • Enormously, to a great extent. 

  • In a mighty manner; with strength or force. 

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