mumbling vs uneven

mumbling

noun

  • An act in which someone mumbles something 

uneven

adj

  • Not even 

  • Not uniform 

  • Varying in quality 

  • Odd 

  • Not level or smooth 

verb

  • To make uneven. 

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