call up vs retrospect

call up

verb
  • To summon (someone) to report for military service. 

  • To select e.g. to a sports squad. 

  • To retrieve from personal or computer memory. 

  • To call on the telephone. 

noun
  • An order to report for military service. 

retrospect

verb
  • To look or refer back to; to reflect on. 

noun
  • Consideration of past times. 

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