dishpan vs piscina

dishpan

noun
  • A large basin or pan with a flat bottom in which dishes are washed. 

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. 

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