assemblyman vs senator

assemblyman

noun
  • A member of the lower house of certain US state legislatures. 

  • A male member of an assembly. 

senator

noun
  • A member of the ruler’s council or governing council in general, a leading statesman. 

  • A member, normally elected, in the house or chamber of a legislature called a senate, as, for instance, the legislatures of the United States and Canada. 

  • A member of the ancient Roman Senate. 

  • A member of a governing council in other states in the ancient world. 

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