Jock vs Masters

Jock

noun

  • A Scot. 

name

  • A nickname. 

  • A given name. 

  • A surname. 

Masters

noun

  • A master's degree. 

  • A person holding a master's degree, as a title. 

name

  • A surname originating as an occupation 

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