retain vs vacate

retain

verb
  • To keep in one's pay or service. 

  • To employ by paying a retainer. 

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

  • To keep in possession or use. 

  • To hold secure. 

vacate

verb
  • To leave an office or position. 

  • To have a court judgement set aside; to annul. 

  • To leave an area, usually as a result of orders from public authorities in the event of a riot or natural disaster. 

  • To move out of a dwelling, either by choice or by eviction. 

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