jet engine vs turbo

jet engine

noun
  • An engine that obtains thrust by taking in air at the front, using it to burn fuel, then ejecting the hot combustion products at the rear through a propulsive nozzle. 

  • Any engine propelled by expelling a high speed fluid jet (jet propulsion), such as a rocket, turbojet, turbofan, ramjet, etc. 

turbo

noun
  • a turbine 

  • A turban shell. 

  • Autofire. 

verb
  • To autofire. 

adj
  • Very, super, etc.; usually relating to a qualitative value (as opposed to quantitative). 

  • Causing or relating to increased speed. 

  • With rapidly-increasing blind levels. 

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