beefburger vs butterbrot

beefburger

noun

  • Synonym of hamburger (a cooked ground beef sandwich) 

  • Synonym of hamburger (ground beef) 

  • Synonym of hamburger (a ground beef patty) 

butterbrot

noun

  • A German open sandwich. 

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