flitter vs shimmer

flitter

noun
  • A small perceptible feeling 

  • Any of various hesperiid butterflies of the genus Hyarotis. 

  • A fluttering movement 

  • A small aircraft or spacecraft. 

  • A rag; a tatter; a small piece or fragment. 

verb
  • To scatter in pieces. 

  • To flutter or quiver. 

  • To move about rapidly and nimbly. 

  • To move quickly from one condition or location to another. 

shimmer

noun
  • A faint or veiled and tremulous gleam or shining. 

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

  • 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. 

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

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