reredos vs stupa

reredos

noun
  • A screen or decoration behind the altar in a church, usually depicting religious iconography or images, akin to the iconostasis of the Eastern Churches. 

  • The back of an open fire-hearth, in medieval halls. 

stupa

noun
  • A dome-shaped Buddhist monument, used to house relics of the Lord Buddha. 

  • A stupe (medicated cloth or sponge). 

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