plinth vs sheth

plinth

noun
  • The bottom course of stones or bricks supporting a wall. 

  • A base or pedestal beneath a cabinet. 

  • A block or slab upon which a column, pedestal, statue or other structure is based. 

sheth

noun
  • The bar on a plough which projects downward beneath the beam to connect to the sole. 

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