sparkle vs thermionic valve

sparkle

noun
  • A little spark; a scintillation. 

  • Brilliance; luster. 

  • Liveliness; vivacity. 

  • The quality of being sparkling or fizzy; effervescence. 

verb
  • To manifest itself by, or as if by, emitting sparks; to glisten; to flash. 

  • To emit sparks; to throw off ignited or incandescent particles 

  • To shine as if throwing off sparks; to emit flashes of light; to scintillate; to twinkle 

  • To emit little bubbles, as certain kinds of liquors; to effervesce 

  • To emit in the form or likeness of sparks. 

thermionic valve

noun
  • An electronic device incorporating electrons from a glowing cathode inside an evacuated glass tube, functioning as a switch, amplifier etc. 

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