alumnus vs associate's degree

alumnus

noun
  • A male graduate. 

  • A student of any gender. 

  • A male pupil or student. 

  • A graduate of any gender. 

associate's degree

noun
  • An academic degree awarded after the equivalent of approximately two years of college education, usually by community colleges. 

How often have the words alumnus and associate's degree occurred in a corpus of books? (source: Google Ngram Viewer )