precast vs unyielding

precast

noun
  • Structural members made of concrete, ready for installation. 

verb
  • To cast in a location other than where to be installed. 

adj
  • Cast previously in another location. 

unyielding

adj
  • Not giving in; not bending; stubborn. 

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