hallmark vs name brand

hallmark

noun
  • An official marking made by a trusted party, usually an assay office, on items made of precious metals. 

  • A distinguishing characteristic. 

verb
  • To provide or stamp with a hallmark. 

name brand

noun
  • A product having such a mark or name 

  • A trademark, or a distinctive name for a brand, or for a range of products by a single manufacturer 

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