demarcation vs subdivision

demarcation

noun
  • A limit thus fixed, in full demarcation line. 

  • Any strictly defined separation. 

  • The act of marking off a boundary or setting a limit, notably by belligerents signing a treaty or ceasefire. 

subdivision

noun
  • A division into smaller pieces of something that has already been divided. 

  • Such a piece that has been divided. 

  • A parcel of land that has been divided into lots. 

  • A group of houses created by the same builder or in the same general area. 

  • A gated community. 

verb
  • To separate something into smaller pieces. 

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