conviction vs weakness

conviction

noun
  • A firmly held belief. 

  • A judgement of guilt in a court of law. 

  • The state of being wholly convinced. 

  • The state of being found or proved guilty. 

weakness

noun
  • A special fondness or desire. 

  • An inadequate quality; fault 

  • The condition of being weak. 

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