shimmer vs sparkle

shimmer

verb
  • To shine tremulously or intermittently; to gleam faintly. 

noun
  • A measure of the irregularities in the loudness of a particular pitch over time. 

  • A faint or veiled and tremulous gleam or shining. 

  • A thin electronic device that is fit inside a card reader, such as on automated teller machines (ATMs), or point-of-sale terminals (POS's), that acts as an intermediate interface between the chip on a chip-and-pin technology card and the chip reader of the machine, to allow one to clone the chip. 

sparkle

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

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

  • To emit in the form or likeness of sparks. 

noun
  • Brilliance; luster. 

  • Liveliness; vivacity. 

  • The quality of being sparkling or fizzy; effervescence. 

  • A little spark; a scintillation. 

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