reservoir vs source

reservoir

noun
  • A supply or source of something. 

  • A species that acts as host to a zoonosis when it is not causing acute illness in other susceptible species. 

  • A "black box" component that receives an input signal to be read out and mapped by another process, as part of reservoir computing. 

  • A small intercellular space, often containing resin, essential oil, or some other secreted matter. 

  • A large natural or artificial lake used as a source of water supply. 

  • A place where anything is kept in store. 

verb
  • To store or keep (something) in or as in a reservoir. 

source

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

  • 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. 

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. 

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