immediately vs now

immediately

adv
  • In an immediate manner; instantly or without delay. 

conj
  • directly (as soon as), instantly, the moment that. Indicates that the independent clause describes something that occurs immediately after the dependent clause's referent does. 

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. 

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. 

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

intj
  • Indicates a signal to begin. 

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

  • Present; current. 

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