flagstone vs pave

flagstone

noun
  • A flat, rectangular piece of rock or stone used for paving or roofing. 

  • One of several types of rock easily split and suitable for making flagstones. 

pave

verb
  • To cover with stone, concrete, blacktop or other solid covering, especially to aid travel. 

  • To cover something with paving slabs. 

  • To pave the way for; to make easy and smooth. 

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