now vs than

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. 

intj
  • Indicates a signal to begin. 

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

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. 

than

adv
  • At that time; then. 

conj
  • Used in comparisons, to introduce the basis of comparison. 

prep
  • introduces a comparison, and is associated with comparatives, and with words such as more, less, and fewer. Typically, it seeks to measure the force of an adjective or similar description between two predicates. 

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