theologus vs vicar

theologus

noun
  • Synonym of theologian (“Roman Catholic lecturer”) 

vicar

noun
  • In the Roman Catholic and some other churches, a cleric acting as local representative of a higher ranking member of the clergy. 

  • A person acting on behalf of, or representing, another person. 

  • In the Church of England, the priest of a parish, receiving a salary or stipend but not tithes. 

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