vulnerability vs weakness

vulnerability

noun
  • The state of being vulnerable; susceptibility to attack or injury, either physical or emotional; the state or condition of being weak or poorly defended. 

  • A weakness which allows an attacker to reduce a system's security. 

  • A specific weakness in the protections or defences surrounding someone or something. 

weakness

noun
  • The condition of being weak. 

  • An inadequate quality; fault 

  • A special fondness or desire. 

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