regrade vs retrieve

regrade

verb
  • To regroup or reassign. 

  • To change the classification of (potentially secret documentation). 

  • To grade again, give a new grade or grading to. 

noun
  • The act or process of grading again. 

retrieve

verb
  • To regain or get back something. 

  • To remember or recall something. 

  • To fetch and bring in game. 

  • To salvage something 

  • To make a difficult but successful return of the ball. 

  • To fetch and bring in game systematically. 

  • To fetch or carry back something, especially (computing) a file or data record. 

  • To rescue (a creature). 

  • To remedy or rectify something. 

  • To fetch or carry back systematically, notably as a game. 

noun
  • The return of a difficult ball 

  • A retrieval 

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