casuist vs sophist

casuist

noun
  • A person who resolves cases of conscience or moral duty. 

  • One who is skilled in, or given to, casuistry. 

  • Someone who attempts to specify exact and precise rules for the direction of every circumstance of behaviour. 

sophist

noun
  • One who is captious, fallacious, or deceptive in argument. 

  • One of a class of teachers of rhetoric, philosophy, and politics in ancient Greece. 

  • A teacher who uses plausible but fallacious reasoning. 

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