aggression vs shyness

aggression

noun
  • Hostile or destructive behavior or actions. 

  • The practice or habit of launching attacks. 

  • The act of initiating hostilities or invasion. 

shyness

noun
  • The quality of being shy; a fear of social interactions. 

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