how vs now

how

conj
  • That, the fact that. 

  • In any way in which; in whatever way; however. 

  • The manner or way in which. 

  • She told me how her father was a doctor. 

noun
  • A small hill in northern England. (Usage preserved mainly in place names.) 

  • The means by which something is accomplished. 

  • An artificial barrow or tumulus. 

adv
  • Used as a modifier to indicate surprise, delight, or other strong feelings in an exclamation. 

  • To what degree or extent. 

  • By what means. 

  • In what manner 

  • With overtones of why, for what reason. 

  • With what meaning or effect. 

  • By what title or what name. 

  • At what price, for what amount (of money). 

  • In what state or condition. 

  • In what form, shape, measure, quantity, etc. 

intj
  • A greeting, used in representations of Native American speech. 

now

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

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. 

intj
  • Indicates a signal to begin. 

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

  • Present; current. 

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