casuist vs perfectionist

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. 

perfectionist

noun
  • Someone who is unwilling to settle for anything that is not perfect or does not meet extremely high standards. 

  • One of the Bible Communists or Free-lovers, a small American sect founded by J. H. Noyes (1811-86), which settled at Oneida in 1848, holding that the gospel if accepted secures freedom from sin. 

adj
  • Demanding perfection; being a perfectionist; imposing overly high standards. 

  • Inclined or related to perfectionism. 

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