Bachelor of Arts vs Bachelor of Science

Bachelor of Arts

noun
  • A collegiate degree, usually involving three to four years of study (about 120 semester hours) in liberal 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. 

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