postdate vs prolepsis

postdate

noun
  • A date on a document later than the real date on which it was written. 

verb
  • To affix a date to after the event. 

  • To occur after an event or time; to exist later on in time 

  • To assign an effective date to a document or action later than the actual date 

prolepsis

noun
  • The assignment of something to a period of time that precedes it. 

  • Growth in which lateral branches develop from a lateral meristem, after the formation of a bud or following a period of dormancy, when the lateral meristem is split from a terminal meristem. 

  • A construction that consists of placing an element in a syntactic unit before that to which it would logically correspond. 

  • The anticipation of an objection to an argument. 

  • A so-called "preconception", i.e. a pre-theoretical notion which can lead to true knowledge of the world. 

  • The practice of placing information about the ending of a story near the beginning, as a literary device. 

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