angle grinder vs cobble

angle grinder

noun
  • A usually hand-held grinder which uses a pair of internal gears to place the rotational axis of the grinding or cutting wheel perpendicular to that of the driving motor. 

cobble

noun
  • A piece of steel that becomes malformed during its manufacture or rolling. 

  • A particle from 64 to 256 mm in diameter, following the Wentworth scale. 

  • A cobblestone. 

verb
  • To assemble in an improvised way. 

  • To use cobblestones to pave a road, walkway, etc. 

  • To make shoes (what a cobbler does). 

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