briefcase vs garment bag

briefcase

noun
  • A case used for carrying documents, especially for business. 

  • In Microsoft Windows, a folder that supports file synchronization between itself and another folder. 

garment bag

noun
  • A bag for transporting garments while they hang on a hanger. 

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