enclave vs fief

enclave

noun
  • A political, cultural or social entity or part thereof that is completely surrounded by another. 

  • A group that is set off from a larger population by its characteristic or behavior. 

  • An isolated portion of an application's address space, such that data in an enclave can only be accessed by code in the same enclave. 

verb
  • To enclose within a foreign territory. 

fief

noun
  • A territory, a domain, an area over which one exercises lordly control, particularly with regard to corporate or governmental bureaucracies. 

  • Land held of a superior, particularly on condition of homage, fealty, and personal service, especially military service. 

  • Synonym of estate: any land, when considered as a region over which the owner exercises lordly control. 

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