casuistry vs speciousness

casuistry

noun
  • A specious argument designed to defend an action or feeling. 

  • The process of answering practical questions via interpretation of rules, or of cases that illustrate such rules, especially in ethics; case-based reasoning. 

speciousness

noun
  • The result or product of being specious. 

  • The state or quality of being specious. 

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