'Amid' is rarely used nowadays. The only case I can think of off the top of my head is the Christmas Carol See amid the winter's snow. I'd call it archiac. It's preserved as a 'fossil' in the word 'amidships' - which itself is pretty well archaic (used to refer to the middle of a ship) but is often used by sport commentators (in Br Eng) when a player is hit in a sensitive area.
'Amid' may sometimes be used in poetry.
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