newsletter vs voting slip

newsletter

noun
  • A periodically sent publication containing current events or the like, generally on a particular topic or geared toward a limited audience. 

voting slip

noun
  • a piece of paper with a list of the candidates at an election (sometimes with an indication of the candidate's party); the voter puts an X in the corresponding place against the candidate of his choice, folds the slip and places it in a ballot box provided. 

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