ballot box vs nomination

ballot box

noun
  • The process or method of voting. 

  • A sealed box with a slit, into which a voter puts a completed voting slip. 

nomination

noun
  • An act or instance of nominating. 

  • A device or means by which a person or thing is nominated. 

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