Marc vs Mark

Marc

name
  • A male given name from French, equivalent to English Mark 

Mark

name
  • A male given name from Latin. 

  • Mark the Evangelist, also called John Mark, the first patriarch of Alexandria, credited with the authorship of the Gospel of Mark. 

  • The Gospel of St. Mark, a book of the New Testament of the Bible. Traditionally the second of the four gospels. 

  • A surname. 

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