peril vs vulnerability

peril

noun
  • Something that causes, contains, or presents danger. 

  • A situation of serious and immediate danger. 

  • An event which causes a loss, or the risk of a specific such event. 

verb
  • To cause to be in danger; to imperil; to risk. 

vulnerability

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

  • 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. 

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