provide vs richen

provide

verb
  • To make a living; earn money for necessities. 

  • To give what is needed or desired, especially basic needs. 

  • To furnish (with), cause to be present. 

  • To make possible or attainable. 

  • To appoint to an ecclesiastical benefice before it is vacant. See provisor. 

  • To establish as a previous condition; to stipulate. 

  • To act to prepare for something. 

richen

verb
  • To make or render rich or richer. 

  • To become rich or richer; become superior in quality, condition or effectiveness. 

  • To gain richness; become heightened or intensified in brilliancy. 

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