deliver vs retain

deliver

verb
  • To set free from restraint or danger. 

  • To give birth to. 

  • To free from or disburden of anything. 

  • To bring or transport something to its destination. 

  • To produce what is expected or required. 

  • To express in words or vocalizations, declare, utter, or vocalize. 

  • To discover; to show. 

  • To administer a drug. 

  • To assist in the birth of. 

  • To give forth in action or exercise; to discharge. 

  • To hand over or surrender (someone or something) to another. 

  • To assist (a female) in bearing, that is, in bringing forth (a child). 

adj
  • Capable, agile, or active. 

retain

verb
  • To hold secure. 

  • 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 one's pay or service. 

  • To keep in possession or use. 

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