alderman vs officeholder

alderman

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

  • A long pipe for smoking. 

  • A potbelly, paunch. 

officeholder

noun
  • A person who holds an office, especially one appointed or elected to a public office; an incumbent 

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