ballot box vs voting

ballot box

noun
  • The process or method of voting. 

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

voting

noun
  • action of the verb to vote 

adj
  • Having an associated right for the holder to vote as an owner of business. 

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