haulier vs smuggler

haulier

noun
  • A person or company engaged in the haulage of goods. 

  • A miner who hauls coal from the coalface to the bottom of the shaft. 

smuggler

noun
  • One who smuggles things. 

  • A vessel employed in smuggling. 

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