cordon something off vs segregate

cordon something off

segregate

adj
  • Separated from others of the same kind. 

  • Separate from a mass and collected together along lines of fraction. 

  • Separate; select. 

verb
  • To separate, especially by social policies that directly or indirectly keep races or ethnic groups apart. 

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