inoculate vs insulate

inoculate

verb
  • To add one substance to another. 

  • To introduce into the mind (used especially of harmful ideas or principles). 

  • To graft by inserting buds. 

  • To introduce an antigenic substance or vaccine into something (e.g. the body) or someone, such as to produce immunity to a specific disease. 

  • To safeguard or protect something as if by inoculation. 

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 inoculate and insulate occurred in a corpus of books? (source: Google Ngram Viewer )