fief vs sector

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. 

sector

noun
  • an area designated by boundaries within which a unit operates, and for which it is responsible 

  • section 

  • a fictional region of space designated for navigational or governance purposes. 

  • a field of economic activity 

  • A fixed, continuous section of the track, such that sectors do not overlap but all sectors make up the whole track. 

  • A toothed gear whose face is the arc of a circle. 

  • part of a circle, extending to the center; circular sector 

  • zone (designated area). 

  • one of the subdivisions of a coastal frontier 

  • an instrument consisting of two rulers of equal length joined by a hinge. 

  • An area of a crag, consisting of various routes 

  • fixed-sized unit (traditionally 512 bytes) of sequential data stored on a track of a digital medium (compare to block) 

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