constituent vs elector

constituent

noun
  • A voter who supports a (political) candidate; a supporter of a cause. 

  • A resident of an area represented by an elected official, particularly in relation to that official. 

  • A part, or component of a whole 

  • A person or thing which constitutes, determines, or constructs 

  • A functional element of a phrase or clause 

  • One who appoints another to act for him as attorney in fact 

adj
  • constitutive or constituting; (politics) authorized to make a constitution 

  • being a part, or component of a whole 

elector

noun
  • A person eligible to vote in an election; a member of an electorate, a voter. 

  • A member of an electoral college; specifically (US) an official selected by a state as a member of the Electoral College to elect the president and vice president of the United States. 

  • A person eligible to vote to elect a Member of Parliament. 

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