blur vs tumble

blur

noun
  • A smear, smudge or blot 

  • Something that appears hazy or indistinct 

adj
  • In a state of doubt or confusion. 

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. 

tumble

noun
  • A disorderly heap. 

  • A fall, especially end over end. 

  • An act of sexual intercourse. 

verb
  • To smoothe and polish, e.g., gemstones or pebbles, by means of a rotating tumbler. 

  • To muss, to make disorderly; to tousle or rumple. 

  • To obscure the audit trail of funds by means of a tumbler. 

  • To perform gymnastics such as somersaults, rolls, and handsprings. 

  • To fall end over end; to roll over and over. 

  • To have sexual intercourse. 

  • To move or rush in a headlong or uncontrolled way. 

  • To drop rapidly. 

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