retain vs scrap

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. 

scrap

verb
  • To discard. 

  • To make into scrap. 

  • to fight 

  • To stop working on indefinitely. 

  • To scrapbook; to create scrapbooks. 

  • To dispose of at a scrapyard. 

noun
  • Loose-leaf tobacco of a low grade, such as sweepings left over from handling higher grades. 

  • A (small) piece; a fragment; a detached, incomplete portion. 

  • A fight, tussle, skirmish. 

  • The crisp substance that remains after drying out animal fat. 

  • The smallest amount. 

  • Discarded objects (especially metal) that may be dismantled to recover their constituent materials, junk. 

  • A piece of deep-fried batter left over from frying fish, sometimes sold with chips. 

  • A Hispanic criminal, especially a Mexican or one affiliated with the Sureno gang. 

  • Leftover food. 

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