stele vs underpinning

stele

noun
  • An upright (or formerly upright) slab containing engraved or painted decorations or inscriptions; a stela. 

  • The central core of a plant's root and stem system, especially including the vascular tissue and developed from the plerome. 

  • Any carved or engraved surface. 

underpinning

noun
  • A support or foundation, especially as a structure of masonry that supports a wall. 

  • The lower body or legs. 

  • A basis for something. 

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