incredibly vs really

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. 

really

adv
  • In a way or manner that is real, not unreal. 

  • Actually; in fact; in reality. 

  • Very (modifying an adjective); very much (modifying a verb). 

intj
  • Indicating that what was just said was obvious and unnecessary; contrived incredulity 

  • Indicating affirmation, agreement. 

  • Indicating surprise at, or requesting confirmation of, some new information; to express skepticism. 

  • Indicating displeasure at another person's behaviour or statement. 

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