baptism vs wudu

baptism

noun
  • A similar ceremony of initiation, purification or naming. 

  • A Christian sacrament, by which one is received into a church and sometimes given a name, generally involving the candidate to be anointed with or submerged in water. 

wudu

noun
  • the state of purity that is achieved by this washing 

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