professor vs student

professor

noun
  • A teacher or faculty member at a college or university regardless of formal rank. 

  • The most senior rank for an academic at a university or similar institution, informally also known as "full professor." 

  • A pianist in a saloon, brothel, etc. 

  • The puppeteer who performs a Punch and Judy show; a Punchman. 

student

noun
  • A person who is formally enrolled at a school, a college or university, or another educational institution. 

  • A person who is enrolled at a college or university (as contrasted with a pupil or schoolchild attending a primary or secondary school). 

  • A person who studies or learns about a particular subject. 

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