libation vs palm wine

libation

noun
  • A beverage, especially an alcoholic one. 

  • The act of pouring a liquid, most often wine, in sacrifice on the ground, on a ritual object, or on a victim, in honor of some deity. 

  • The wine or liquid thus poured out. 

palm wine

noun
  • The alcoholic drink toddy. 

  • A genre of popular music most closely associated with mid-20th-century Sierra Leone. 

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