off-color vs unrefined

off-color

adj
  • Dirty, vulgar or obscene, especially in a way that is unpleasant. 

  • Feeling mildly unwell. 

  • Different than usual. 

  • Of the wrong color. 

unrefined

adj
  • crude, raw or unprocessed 

  • lacking refinement; uncouth 

How often have the words off-color and unrefined occurred in a corpus of books? (source: Google Ngram Viewer )