off-color vs virtuous

off-color

adj
  • Feeling mildly unwell. 

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

  • Different than usual. 

  • Of the wrong color. 

virtuous

adj
  • Full of virtue, having excellent moral character. 

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