salver vs soup plate

salver

noun
  • One who salves or cures. 

  • One who salves or saves goods, etc. from destruction or loss. 

  • A tray used to display or serve food or other items (such as a visiting card). 

  • One who pretends to cure; a quacksalver. 

soup plate

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