anguish vs persecution

anguish

noun
  • Extreme pain, either of body or mind; excruciating distress. 

verb
  • To cause to suffer pain. 

  • To suffer pain. 

persecution

noun
  • The act of persecuting. 

  • A program or campaign to subjugate or eliminate a specific group of people, often based on race, religion, sexuality, or social beliefs. 

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