coffer vs dropbox

coffer

noun
  • A strong chest or box used for keeping money or valuables safe. 

  • An ornamental sunken panel in a ceiling or dome. 

  • A trench dug in the bottom of a dry moat, and extending across it, to enable the besieged to defend it with raking fire. 

  • A cofferdam. 

  • A supply or store of money, often belonging to an organization. 

verb
  • To put money or valuables in a coffer 

  • To decorate something, especially a ceiling, with coffers. 

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 coffer and dropbox occurred in a corpus of books? (source: Google Ngram Viewer )