However, the beavers accidental arrival in Tayside is a unique occurrence.

If the attempt is successful, it would constitute a unique occurrence, not a record.

"On the other hand, he has an instinctive interest in the commonplace occurrences unique to Mexico."

And hey, that's a pretty unique occurrence in the "pit"!

This is not a unique occurrence in Kilcommon parish.

The observatory is open to all students on the first Friday of every month and for any unique celestial occurrences.

Artists challenge the limitations of their historical time and view change as an opportunity to create a unique occurrence.

Darla becomes pregnant, a unique occurrence for a vampire.

This was not a unique occurrence; she allegedly had been physically abused for years by the hero of this book.

This is a unique occurrence in democratic politics that is unacceptable.