source vs thrust

source

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. 

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. 

thrust

noun
  • A push, stab, or lunge forward (the act thereof.) 

  • An attack made by moving the sword parallel to its length and landing with the point. 

  • The primary effort; the goal. 

  • The force generated by propulsion, as in a jet engine. 

verb
  • To stab; to pierce; usually with through. 

  • To enter by pushing; to squeeze in. 

  • To push out or extend rapidly or powerfully. 

  • To make advance with force. 

  • To push or drive with force; to shove. 

  • To force something upon someone. 

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