predicant vs theologus

predicant

noun
  • Someone who preaches, especially a Dominican friar 

  • Someone who predicates 

adj
  • Predicating; affirming; declaring; proclaiming. 

  • preaching 

theologus

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

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