clipboard vs random access memory

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. 

random access memory

noun
  • Computer memory, usually volatile, that stores program and data values during operation and in which each word of memory may be directly (randomly) accessed. 

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