on rare occasions

On rare occasions, Im would be lucky enough to buy a piece of candy by selling bottles or scrap rubber.

The American Meteor Society considers the Draconids as variable meteor showers because they can produce little activity or, on rare occasions, illuminate the sky with hundreds of shooting stars.

On rare occasions, we get bluefin tuna that’s been raised sustainably and with that fattier tuna we’re able to do some different things.

On rare occasions, earthquakes can trigger instantaneous avulsions, but none has been noted in a delta, most of which are seismically inactive.

On rare occasions, a party to a case will ask a justice to recuse.