partiality vs weakness

partiality

noun
  • The quality of being partial or incomplete. 

  • Preference, bias in favor of, tendency. 

weakness

noun
  • An inadequate quality; fault 

  • The condition of being weak. 

  • A special fondness or desire. 

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