Roman Catholic vs catholicos

Roman Catholic

noun
  • A person who belongs to the (Roman) Catholic Church. 

adj
  • Of or pertaining to the Latin rite, Latin Church, or Roman Rite of the Catholic Church. 

  • Of or pertaining to the Roman Catholic Church and Roman Catholicism. 

catholicos

noun
  • A high-ranking bishop or patriarch in certain Eastern Christian traditions. 

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