grubby vs undusted

grubby

adj

  • Dirty, unwashed, unclean. 

  • Disreputable, sordid. 

  • Having grubs in it. 

noun

  • Any species of Cottus; a sculpin. 

undusted

adj

  • Not dusted. 

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