aegis vs insurance

aegis

noun
  • Usually as under the aegis: guidance, protection; endorsement, sponsorship. 

  • A mythological shield associated with the Greek deities Zeus and Athena (and their Roman counterparts Jupiter and Minerva) shown as a short cloak made of goatskin worn on the shoulders, more as an emblem of power and protection than a military shield. The aegis of Athena or Minerva is usually shown with a border of snakes and with the head of Medusa in the center. 

insurance

noun
  • The business of providing insurance. 

  • A means of indemnity against a future occurrence of an uncertain event. 

  • The car was totalled, but fortunately I had insurance. 

  • Any attempt to forestall an unfavorable event. 

  • A bet made after the deal, which pays off if the dealer has blackjack. 

  • An insurance policy 

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