consume vs retain

consume

verb
  • To use up. 

  • To trade money for good or services as an individual. 

  • To completely occupy the thoughts or attention of. 

  • To eat. 

  • To destroy completely. 

  • To absorb information, especially through the mass media. 

retain

verb
  • To keep in possession or use. 

  • 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 hold secure. 

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