now vs yes

now

intj
  • Indicates a signal to begin. 

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

  • Present; current. 

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. 

adv
  • 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). 

  • At the present time. 

  • 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. 

yes

intj
  • Response that confirms that the user is paying attention. 

  • An exclamation of pleasure or approval, usually transcribed with an exclamation point. 

  • Used to ask for more information with a request. 

verb
  • to agree with, affirm, approve. 

  • to attempt to flatter someone by habitually agreeing 

particle
  • Answer to a question presuming one answer when all answers are correct. 

  • Used to indicate disagreement or dissent in reply to a negative statement. 

  • Used to show agreement or acceptance. 

adv
  • that is correct 

noun
  • An affirmative expression; an answer that shows agreement or acceptance. 

  • A vote of support or in favor/favour of something. 

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