bath sponge vs scouring pad

bath sponge

noun
  • A sponge, made from any material, that is used for cleaning the body while bathing. 

  • A commercially used species of sponge (porifer, invertebrate of the phylum Porifera) found throughout the Mediterranean Sea, Spongia officinalis. 

scouring pad

noun
  • A pad, having a soft, sponge-like side and a more abrasive side, used to wash up. 

  • A flat piece of a rough fabric used for cleaning purposes. 

How often have the words bath sponge and scouring pad occurred in a corpus of books? (source: Google Ngram Viewer )