aggression vs onslaught

aggression

noun
  • The act of initiating hostilities or invasion. 

  • Hostile or destructive behavior or actions. 

  • The practice or habit of launching attacks. 

onslaught

noun
  • A fierce attack. 

  • A large number of people or things resembling an attack. 

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