professor vs reader

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. 

reader

noun
  • A person who reads. 

  • A person who reads a publication. 

  • Any device that reads something. 

  • A literary anthology. 

  • A person who recites literary works, usually to an audience. 

  • A position attached to aristocracy, or to the wealthy, with the task of reading aloud, often in a foreign language. 

  • A person employed by a publisher to read works submitted for publication and determine their merits. 

  • Marked playing cards used by cheaters. 

  • A newspaper advertisement designed to look like a news article rather than a commercial solicitation. 

  • An elementary textbook for those learning to read, especially for foreign languages. 

  • A university lecturer ranking below a professor. 

  • A book of exercises to accompany a textbook. 

  • A lay or minor cleric who reads lessons in a church service. 

  • Reading glasses. 

  • A proofreader. 

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