crumb vs dandruff

crumb

verb
  • To cover with crumbs. 

  • To break into crumbs or small pieces with the fingers; to crumble. 

noun
  • A mixture of sugar, cocoa and milk, used to make industrial chocolate. 

  • A nobody; a worthless person. 

  • A small piece of other material, such as rubber. 

  • A body louse (Pediculus humanus). 

  • The soft internal portion of bread, surrounded by crust. 

  • A bit, small amount. 

  • A small piece which breaks off from baked food (such as cake, biscuit or bread). 

dandruff

verb
  • To fall or cover with white flakes, like dandruff. 

noun
  • scaly white dead skin flakes from the human scalp; Pityriasis capitis 

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