pyx vs trough

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. 

trough

noun
  • A long, narrow container, open on top, for feeding or watering animals. 

  • A gutter under the eaves of a building; an eaves trough. 

  • A linear atmospheric depression associated with a weather front. 

  • A rectangular container used for washing or rinsing clothes. 

  • A long, narrow depression between waves or ridges; the low portion of a wave cycle. 

  • A channel for conveying water or other farm liquids (such as milk) from place to place by gravity; any ‘U’ or ‘V’ cross-sectioned irrigation channel. 

  • Any similarly shaped container. 

  • A short, narrow canal designed to hold water until it drains or evaporates. 

  • low turning point or a local minimum of a business cycle 

verb
  • To eat in a vulgar style, as if from a trough. 

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