clipboard vs safekeeping

clipboard

noun
  • A buffer in memory where the user can store data temporarily while transferring it from one place within an application to another or between applications. 

  • A flat piece of rigid material, such as card or plastic, with a clip at one end under which papers can be held. 

safekeeping

noun
  • the storage of assets in a protected area 

  • the responsibility of a guardian 

  • the act of keeping something safe; protection from harm, damage, loss, or theft 

  • not returning checks; a system wherein banks keep checks (cheques) that people write, rather than returning them to the account holder with their monthly statement. 

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