master vs professor

master

noun
  • Someone who has control over something or someone. 

  • A parajudicial officer (such as a referee, an auditor, an examiner, or an assessor) specially appointed to help a court with its proceedings. 

  • A vessel having a specified number of masts. 

  • The original of a document or of a recording. 

  • A male dominant. 

  • A master's degree; a type of postgraduate degree, usually undertaken after a bachelor degree. 

  • The primary wide shot of a scene, into which the closeups will be edited later. 

  • A tradesman who is qualified to teach apprentices. 

  • The owner of an animal or slave. 

  • A skilled artist. 

  • Someone who employs others. 

  • A person holding an office of authority, especially the presiding officer. 

  • A person holding such a degree. 

  • The captain of a merchant ship; a master mariner. 

  • An expert at something. 

  • A device that is controlling other devices or is an authoritative source. 

  • A person holding a similar office in other civic societies. 

adj
  • Original. 

  • Masterful. 

  • Main, principal or predominant. 

  • Highly skilled. 

verb
  • To earn a Master's degree. 

  • To become the master of; to subject to one's will, control, or authority; to conquer; to overpower; to subdue. 

  • To be a master. 

  • To learn to a high degree of proficiency. 

  • To make a master copy of. 

professor

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

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

  • A pianist in a saloon, brothel, etc. 

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

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