fortify vs squad

fortify

verb
  • To impart strength or vigor to. 

  • To increase the nutritional value of food by adding ingredients. 

  • To increase the defenses of; to strengthen and secure by military works; to render defensible against an attack by hostile forces. 

  • To add spirits to wine to increase the alcohol content. 

squad

verb
  • To act as part of, or on behalf of, a squad. 

noun
  • Sloppy mud. 

  • One's friend group, taken collectively; one's peeps. 

  • A unit of tactical military personnel, or of police officers, usually of about ten members. 

  • A group of potential players from whom a starting team and substitutes are chosen. 

  • A collective noun for a group of squid. 

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