mechanic vs oiler

mechanic

noun
  • Someone who builds or repairs machinery, a technician; now specifically, someone who works with and repairs the mechanical parts of a motor vehicle, aircraft or similar. 

  • A cheat who manipulates the cards or dice. 

  • A manual worker; a labourer or artisan. 

  • A hitman. 

  • A device, command, or feature which allows someone to achieve a specific task. 

oiler

noun
  • An assistant in the engine room of a ship, senior only to a wiper, mainly responsible for keeping machinery lubricated. 

  • One who or that which oils. 

  • A small (typically thumb-sized) metal container of oil, often containing an integral brush. 

  • An oilskin coat. 

  • A Mexican. 

  • An oil tanker. 

  • An oil well. 

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