basin vs washbowl

basin

noun
  • A wide bowl for washing, sometimes affixed to a wall. 

  • A rock formation scooped out by water erosion. 

  • An area of land from which water drains into a common outlet; drainage basin. 

  • A depression, natural or artificial, containing water. 

verb
  • To serve as or become a basin. 

  • To shelter or enclose in a basin. 

  • To create a concavity or depression in. 

washbowl

noun
  • A sink in a bathroom, connected to a supply of water and a drain, in which one may wash one's face and hands. 

  • A basin for washing the face and hands; a washbasin. 

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