kick the habit vs palliate

kick the habit

verb
  • To recover from or quit an addiction or habit. For example, to quit smoking, drinking, or drug addiction. 

palliate

verb
  • To relieve the symptoms of; to ameliorate. 

  • To cover or disguise the seriousness of (a mistake, offence etc.) by excuses and apologies. 

  • To placate or mollify. 

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