libation vs offering

libation

noun
  • 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. 

  • A beverage, especially an alcoholic one. 

  • The wine or liquid thus poured out. 

offering

noun
  • That which has been offered; a sacrifice. 

  • Something put forth, bid, proffered or tendered, such as for sale 

  • The act by which something is offered. 

  • A contribution given at a religious service. 

  • An oblation or presentation made as a religious act. 

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