blur vs lour

blur

noun
  • Something that appears hazy or indistinct 

  • A smear, smudge or blot 

verb
  • 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. 

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

adj
  • In a state of doubt or confusion. 

lour

noun
  • Of the sky, the weather, etc.: a dark, gloomy, and threatening appearance. 

  • A frown, a scowl; an angry or sullen look. 

verb
  • To be dark, gloomy, and threatening, as clouds; of the sky: to be covered with dark and threatening clouds; to show threatening signs of approach, as a tempest. 

  • To frown; to look sullen. 

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