sappy vs sickly sweet

sappy

adj
  • Excessively sweet, emotional, nostalgic; cheesy; mushy. (British equivalent: soppy) 

  • Having (a particularly large amount of) sap. 

sickly sweet

adj
  • Too sweet; sickeningly sweet. 

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