I never refreeze, but then again I can't remember the last time I had a meal refused by any snake.
When I had my corn, she was on no schedule for activity. Some days she liked mornings, others evenings, and certainly she was out sometimes at night.
Corns in the wild will hunt both during the day and the night, but are more prone to daytime hunting than many other snake species (particularly pythons which are mostly notoriously nocturnal)