mountain vs upthrow

mountain

noun
  • Something very large in size or quantity; a huge amount; a great heap. 

  • A difficult task or challenge. 

  • An elevation of land of considerable dimensions rising more or less abruptly, forming a conspicuous figure in the landscape, usually having a small extent of surface at its summit. 

  • Wine from Malaga made from grapes that grow on a mountain. 

  • A woman's large breast. 

  • The twenty-first Lenormand card. 

upthrow

noun
  • A fault in which a mass of material has been thrown up from below. 

verb
  • To be thrown up from below, causing a fault. 

  • To throw up (a mass of material) from below, causing a fault. 

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