dressing gown vs full dress

dressing gown

noun
  • An item of clothing often made from cotton or another absorbent material, in the form of a long open robe with a belt to tie it around the middle and fasten it securely; often worn over pyjamas. 

full dress

noun
  • Clothing worn on formal occasions. 

adj
  • Requiring a full-scale operation with attention to every minute detail. 

How often have the words dressing gown and full dress occurred in a corpus of books? (source: Google Ngram Viewer )