bier vs obsequy

bier

noun
  • A platform or stand where a body or coffin is placed. 

  • A litter to transport the corpse of a dead person. 

  • A count of forty threads in the warp or chain of woollen cloth. 

obsequy

noun
  • A funeral rite or service. 

  • The last office for the dead. 

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