Romanist vs popish

Romanist

noun
  • An expert in the Romance languages. 

  • A student in the culture etc. of ancient Rome; an expert on ancient Rome. 

  • A Roman Catholic. 

popish

adj
  • of or pertaining to Roman Catholicism 

  • acting like, or holding beliefs similar to, the pope. 

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