egghead vs professor

egghead

noun
  • A bald head. 

  • A coldly out of personal touch intellectual. 

  • A bald person, especially a man. 

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 egghead and professor occurred in a corpus of books? (source: Google Ngram Viewer )