retain vs review

retain

verb
  • To hold back (a pupil) instead of allowing them to advance to the next class or year. 

  • To employ by paying a retainer. 

  • To keep in one's pay or service. 

  • To keep in possession or use. 

  • To hold secure. 

review

verb
  • To look over again (something previously written or learned), especially in preparation for an examination. 

  • To look back over in order to correct or edit; to revise. 

  • To survey; to look broadly over. 

  • To write a critical evaluation of a new art work etc.; to write a review. 

noun
  • A survey of the available items or material. 

  • A second or subsequent reading of a text or artifact in an attempt to gain new insights. 

  • A stage show made up of topical sketches etc. 

  • A military inspection or display for the benefit of superiors or VIPs. 

  • A judicial reassessment of a case or an event. 

  • A periodical which makes a survey of the arts or some other field. 

  • An account intended as a critical evaluation of a text or a piece of work. 

  • A forensic inspection to assess compliance with regulations or some code. 

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