extramural vs foreign

extramural

adj
  • Taking place outside the walls of an institution, especially a school or university. 

  • Describing teaching of students who are not resident at such an institution. 

foreign

adj
  • Located outside a country or place, especially one's own. 

  • Alien; strange. 

  • Relating to a different nation. 

  • Not characteristic of or naturally taken in by an organism or system. 

  • From a different one of the states of the United States, as of a state of residence or incorporation. 

  • Belonging to a different organization, company etc. 

  • Originating from, characteristic of, belonging to, or being a citizen of a country or place other than the one under discussion. 

noun
  • An area of a community that lies outside the legal town or parish limits. 

  • A foreigner: a person from another country. 

  • A foreign whip, a car produced abroad. 

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