germ vs source

germ

noun
  • The origin or earliest version of an idea or project. 

  • The small mass of cells from which a part of an organism develops, or a macroscopic but immature form of that part; a bud. 

  • The embryo of a seed, especially of a seed used as a cereal or grain. See Wikipedia article on cereal germ. 

  • A pathogen: a pathogenic microorganism, such as a bacterium or virus. 

  • An equivalence class that includes a specified function defined in an open neighborhood. 

verb
  • To germinate. 

  • To grow, as if parasitic. 

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 germ and source occurred in a corpus of books? (source: Google Ngram Viewer )