adumbration vs blur

adumbration

noun
  • The state of being in shadow or shade; (countable) a shadow. 

  • The outline of a charge (“image displayed on an escutcheon”), sometimes filled in with a darker shade than the field. 

  • The form of an object as seen by an observer. 

  • A rough or symbolic representation; a vague indication of what is to come, a foreshadowing. 

  • A faint sketch; a brief representation, an outline. 

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. 

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