blur vs flicker

blur

verb
  • To make indistinct or hazy, to obscure or dim. 

  • To cause imperfection of vision in; to dim; to darken. 

  • To become indistinct. 

  • To transfer the input focus away from. 

  • To smear, stain or smudge. 

noun
  • Something that appears hazy or indistinct 

  • A smear, smudge or blot 

adj
  • In a state of doubt or confusion. 

flicker

verb
  • To burn or shine unsteadily, or with a wavering light. 

  • To flutter or flap. 

  • To keep going on and off; to appear and disappear for short moments; to flutter. 

noun
  • Any of certain small woodpeckers, especially of the genus Colaptes. 

  • One who flicks. 

  • An unsteady flash of light. 

  • A short moment. 

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