Sentence examples for this is a one-off from inspiring English sources

"We all know that this is a one-off opportunity to put Paralympic sport on the map in Britain".

I hope this is a one-off.

This is a one-off.

This is a one-off home event.

But this is a one-off boost to revenue.

This is a one-off piece of capital funding.

"The hope is that this was a one-off action," one official said.

Nor will this be a one-off.

Will this be a one-off?

Loeb figures this was "a one-off opportunity".

We can confirm that this was a one-off, genuine error.