incredibly vs madly

incredibly

adv
  • In an incredible manner; not to be believed. 

  • To a great extent; extremely. 

  • Used to note the surprising or hard-to-believe nature of what is being said and suggest that it is nevertheless true. 

madly

adv
  • without reason or understanding; wildly. 

  • angrily 

  • extremely surprisingly or unexpectedly 

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