filthy vs naughty

filthy

adj
  • Very unpleasant or disagreeable. 

  • Covered with filth; very dirty. 

  • Obscene or offensive. 

verb
  • To make very dirty; to saturate something with dirt. 

  • To cover in filth. 

naughty

adj
  • Mischievous; tending to misbehave or act badly (especially of a child). 

  • Sexually provocative; now in weakened sense, risqué, cheeky. 

verb
  • To perform sexual acts upon. 

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