Bachelor of Science vs Master of Arts

Bachelor of Science

noun
  • A three- to four-year (about 120 credit hours) undergraduate degree, with a concentration in the sciences or scientific applications. 

Master of Arts

noun
  • A postgraduate degree usually in a non-science subject. 

  • A person holding such a degree. 

How often have the words Bachelor of Science and Master of Arts occurred in a corpus of books? (source: Google Ngram Viewer )