brandmark vs monogram

brandmark

verb
  • To name or mark by branding; to give a brandmark to. 

noun
  • The logo of a brand 

monogram

verb
  • To mark something with a monogram. 

noun
  • A design or motif composed of one or more letters, often intertwined, used as an identifying mark of an individual or institution. 

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