aggression vs foray

aggression

noun
  • The act of initiating hostilities or invasion. 

  • Hostile or destructive behavior or actions. 

  • The practice or habit of launching attacks. 

foray

noun
  • A sudden or irregular incursion in border warfare; hence, any irregular incursion for war or spoils; a raid. 

  • A brief excursion or attempt, especially outside one's accustomed sphere. 

verb
  • To participate in a foray. 

  • To do or attempt something outside one's typical area of expertise. 

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