libertine vs louche

libertine

adj
  • Dissolute, licentious, profligate; loose in morals. 

noun
  • One who is freethinking in religious matters. 

  • Someone (especially a man) who takes no notice of moral laws, especially those involving sexual propriety; someone loose in morals; a pleasure-seeker. 

  • Someone freed from slavery in Ancient Rome; a freedman. 

louche

adj
  • Of questionable taste or morality; decadent. 

  • Unconventional and slightly disreputable in an attractive manner; raffish, rakish. 

  • Not reputable or decent. 

verb
  • To make (an alcoholic beverage, e.g. absinthe or ouzo) cloudy by mixing it with water, due to the presence of anethole. This is known as the ouzo effect. 

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