dragoman vs philologist

dragoman

noun
  • An interpreter, especially for the Arabic and Turkish languages. 

philologist

noun
  • A person who engages in philology (historical linguistics), especially as a profession; a collector of words and their etymologies. 

  • A person devoted to general learning and literature. 

  • A person devoted to classical scholarship. 

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