piscina vs washstand

piscina

noun
  • A drained basin near a church's altar for the disposal of water from liturgical ablutions. 

  • A basin or tank, especially one for holding fishes or for growing aquatic plants. 

washstand

noun
  • A table containing a basin and a pitcher of water for washing 

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