milker vs sponger

milker

noun
  • A milking machine. 

  • A woman’s breast. 

  • A person who milks. 

  • An animal, such as a dairy cow, kept for the milk it produces. 

  • A conservative poker player who only raises the stakes on a good hand. 

sponger

noun
  • A device for sponging cloth by means of a perforated adjustable cylinder. 

  • One who uses a sponge. 

  • A parasitic hanger-on. 

  • A person or vessel employed in gathering sponges from the sea. 

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