imperative vs later

imperative

adj
  • Expressing a command; authoritatively or absolutely directive. 

  • Having semantics that incorporates mutable variables. 

  • Essential; crucial; extremely important. 

  • Of, or relating to the imperative mood. 

noun
  • A verb in imperative mood. 

  • The grammatical mood expressing an order (see jussive). In English, the imperative form of a verb is the same as that of the bare infinitive. 

  • An essential action, a must: something which is imperative. 

later

adj
  • Coming afterward in distance (following an antecedent distance as embedded within an adverbial phrase) 

  • At some time in the future. 

  • Coming afterward in time (used with than when comparing with another time). 

adv
  • Afterward in time (used with than when comparing with another time). 

  • At some unspecified time in the future. 

intj
  • See you later; goodbye. 

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