scummy vs uncleanly

scummy

adj
  • sleazy, worthless, no good 

  • Covered in scum. 

uncleanly

adj
  • Dirty, unhygienic, not clean. 

  • Not pure in a moral or religious sense. 

adv
  • not in a clean way; in an unclean way 

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