breadcrumb vs rusk

breadcrumb

noun
  • A tiny piece of bread, either one that falls from bread as it is cut or eaten, or one made deliberately by crumbling bread. 

  • A single link in a chain indicating the hierarchical location of a directory, web page or similar, used as a navigation aid. 

  • One in a series of clues leading to a person or place. 

verb
  • To add navigational breadcrumbs to (a web page or user interface). 

  • To use clues or enticements to lead someone in the desired direction. 

  • To sprinkle breadcrumbs on to food, normally before cooking. 

rusk

noun
  • a twice-baked bread, slices of bread baked until they are hard and crisp (also called a zwieback) 

  • a rectangular, hard, dry biscuit 

  • a cereal binder used in meat product manufacture 

  • a weaning food for children 

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