ballot box vs dropbox

ballot box

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

  • The process or method of voting. 

dropbox

noun
  • A box wherein objects can be deposited by one person for later collection by another. 

  • A computer folder to which files may be dragged and dropped and from which users of other computers on the network can access those files. 

  • An enhancement to a loom that allows patterns of multiple colors to be woven from the same loom. 

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