resource vs source

resource

verb
  • To supply with resources. 

  • To source anew or differently; to find or provide a new source for. 

noun
  • Something that one uses to achieve an objective, e.g. raw materials or personnel. 

  • Something that can be used to help achieve an aim, especially a book, equipment, etc. that provides information for teachers and students. 

  • A person's capacity to deal with difficulty. 

  • Hardware or software accessible by a computer, network, or another object connected to a computer. 

source

verb
  • To obtain or procure: used especially of a business resource. 

  • To find information about (a quotation)'s source (from which it comes): to find a citation for. 

noun
  • A reporter's informant. 

  • Source code. 

  • The name of one terminal of a field effect transistor (FET). 

  • Spring; fountainhead; wellhead; any collection of water on or under the surface of the ground in which a stream originates. 

  • The person, place, or thing from which something (information, goods, etc.) comes or is acquired. 

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