alderman vs politician

alderman

noun
  • A member of a municipal legislative body in a city or town. 

  • A long pipe for smoking. 

  • A potbelly, paunch. 

politician

noun
  • One engaged in politics, especially an elected or appointed government official. 

  • Specifically, one who regards elected political office as a career. 

  • A sly or ingratiating person. 

  • A politically active or interested person. 

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