now vs really

now

adv
  • At the present time. 

  • Used to indicate a context of urgency. 

  • Sometimes; occasionally. 

  • Used to address a switching side, or sharp change in attitude from before. (In this usage, now is usually emphasized). 

  • Used to introduce a point, a qualification of what has previously been said, a remonstration or a rebuke. 

  • At the time reached within a narration. 

  • Differently from the immediate past; differently from a more remote past or a possible future; differently from all other times. 

conj
  • Since, because, in light of the fact; often with that. 

adj
  • Fashionable; popular; up to date; current. 

  • Present; current. 

intj
  • Indicates a signal to begin. 

noun
  • The state of not paying attention to the future or the past. 

  • The present time. 

  • A particular instant in time, as perceived at that instant. 

really

adv
  • Actually; in fact; in reality. 

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

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

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 now and really occurred in a corpus of books? (source: Google Ngram Viewer )