pantograph vs squeezebox

pantograph

noun
  • By extension, a structure of crosswise bars linked in such a way that it can extend and compress like an accordion, such as in a pantograph mirror or a scissor lift. 

  • A similarly-formed conductive device, now usually Z-shaped, that collects electric current from overhead lines for trains and trams. 

  • A mechanical linkage based on parallelograms causing two objects to move in parallel; notably as a drawing aid. 

  • A pattern printed on a document to reduce the ease of photocopying. 

verb
  • To engrave by means of a pantograph (parallel linkage) system. 

squeezebox

noun
  • Synonym of accordion or concertina. 

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