cumbrous vs mammoth

cumbrous

adj
  • Unwieldy because of size or weight; cumbersome. 

mammoth

adj
  • Comparable to a mammoth in its size; very large, huge, gigantic. 

noun
  • Something very large of its kind. 

  • Any species of the extinct genus Mammuthus, of large, usually hairy, elephant-like mammals with long curved tusks and an inclined back, which became extinct with the last retreat of ice age glaciers during the late Pleistocene period, and are known from fossils, frozen carcasses, and Paleolithic cave paintings found in North America and Eurasia. 

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