pyx vs receptacle

pyx

noun
  • A small, usually round container used to hold the host (“consecrated bread or wafer of the Eucharist”), especially when bringing communion to the sick or others unable to attend Mass. 

  • A box used in a mint as a place to deposit sample coins intended to have the fineness of their metal and their weight tested before the coins are issued to the public. 

  • A (small) box; a casket, a coffret. 

verb
  • To enclose (something) in a box or other container; specifically, to place (a deceased person's body) in a coffin; to coffin, to encoffin. 

  • To deposit (sample coins) in a pyx; (by extension) to test (such coins) for the fineness of metal and weight before a mint issues them to the public. 

receptacle

noun
  • A container. 

  • In the Asteraceae (aster or sunflower family), the end of the peduncle to which all of the florets of the flower head are attached. 

  • A contact device installed at an outlet for the connection of an attachment plug (typically by receiving the plug's prongs) to supply portable appliances or equipment. 

  • A structure at the end of a branch of an alga containing conceptacles (reproductive organs). 

  • An organ that receives and holds a secretion. 

  • The part of the flower stalk (peduncle or pedicel) to which the floral parts are attached; a thalamus, a torus. 

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