keystrip vs pop-up

keystrip

noun
  • The strip of wood immediately below and in front of the keys of a piano. 

  • A long thin piece of material that serves to operate a lock. 

  • A row of pushbuttons. 

  • A physical overlay for a computer keyboard, indicating the functions of certain keys within a particular software package. 

pop-up

noun
  • A folded paper element which pops up from a book, greeting card, etc. 

  • A pop-up ball: a ball that has been hit to a considerable height above the infield or the shallow outfield; a pop fly. 

  • A business that quickly pops up, such as a temporary restaurant. 

  • A pop-up advertisement; an advertisement that is triggered to appear on a computer screen when an Internet user accesses a particular web page. 

adj
  • Opening out to form a three-dimensional structure when the page of a book is opened. 

  • Coming into view suddenly from a concealed position. 

  • Employing the cold launch technique. 

  • Operating or existing for a brief period only; temporary. 

How often have the words keystrip and pop-up occurred in a corpus of books? (source: Google Ngram Viewer )