labyrinth vs overburden

labyrinth

noun
  • A complex structure in the inner ear which contains the organs of hearing and balance. It consists of bony cavities (the bony labyrinth) filled with fluid and lined with sensitive membranes (the membranous labyrinth). 

  • Any of various satyrine butterflies of the genus Neope. 

  • A complicated irregular network of passages or paths, especially underground or covered, in which it is difficult to find one's way. 

  • An accessory respiratory organ of certain fish. 

  • A maze formed by paths separated by high hedges. 

  • Anything complicated and confusing in structure, arrangement, or character. 

verb
  • to twist and wind, following a labyrinthine path 

  • to enclose in a labyrinth, or as though in a labyrinth 

  • to render lost and confused, as if in a labyrinth 

  • to arrange in the form of a labyrinth 

overburden

noun
  • A sterile stratum that lies above the stratum being investigated 

  • The rock and subsoil that lies above a mineral deposit such as a coal seam. 

verb
  • To overload or overtax. 

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