euchologion vs ordinal

euchologion

noun
  • A book of prayers or religious ritual. 

ordinal

noun
  • A book used in the ordination of Anglican ministers, or in certain Roman Catholic services 

  • An ordinal number such as first, second and third. 

  • 2005, F. M. Wheelock, Wheelock’s Latin, 6th edition, revised, page 97 

  • The most common numerals in Latin, as in English, are the "cardinals"[…]and the "ordinals"[…] 

adj
  • Intercardinal. 

  • Pertaining to a taxon at the rank of order. 

  • Indicating position in a sequence. 

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