induction vs riser

induction

noun
  • The delivery of air to the cylinders of an internal combustion piston engine. 

  • An act of inducing. 

  • Derivation of general principles from specific instances. 

  • A method of proof of a theorem by first proving it for a specific case (often an integer; usually 0 or 1) and showing that, if it is true for one case then it must be true for the next. 

  • An act of inducting. 

  • The process of inducing the birth process. 

  • Generation of an electric current by a varying magnetic field. 

  • A formal ceremony in which a person is appointed to an office or into military service. 

  • The process of showing a newcomer around a place where they will work or study. 

  • Use of rumors to twist and complicate the plot of a play or to narrate in a way that does not have to state truth nor fact within the play. 

  • Given a group of cells that emits or displays a substance, the influence of this substance on the fate of a second group of cells 

riser

noun
  • A pipe connecting an individual exhaust port of an internal combustion engine to the muffler, particularly on aircraft. 

  • a reservoir built into a metal casting mold to prevent the formation of cavities in the casting as the metal shrinks on cooling. 

  • A platform or stand used to lift or elevate something. 

  • A Manx cat with a showable short tail. 

  • A strip of webbing joining a parachute's harness to the rigging lines. 

  • A vertical utility conduit, pipe or path between floors of a building for placement of cables (e.g. telephone, networking), or to convey fluids (e.g. gas, water). 

  • Someone or something which rises. 

  • The main body of a bow. 

  • The vertical part of a step on a staircase. 

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