cut off vs insulate

cut off

verb
  • To isolate or remove from contact. 

  • To remove via cutting. 

  • To turn off or switch off (an electrical device). 

  • (North American) swerve in front of (another car) while driving; cut [someone] up 

  • To interrupt (someone speaking). 

  • To end abruptly. 

  • To stop providing funds to (someone). 

  • To stop the provision or supply of something, e.g. power, water. 

insulate

verb
  • To separate, detach, or isolate. 

  • To separate a body or material from others, e.g. by non-conductors to prevent the transfer of electricity, heat, etc. 

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