So you see, there is no great coincidence in our meeting.

'We seem to live in a time of great coincidences.'

It's a great coincidence and, for the listeners, an opportunity that is not to be missed.

So it was no great coincidence that he discovered the cave where men were hidden.

I, too, believed it was a great coincidence that my pet could find me, out in the midst of these barren woods.

'It would be too great a coincidence if they hadn't, given that their trail led straight here.'

It is a great coincidence because we trained together at drama school.

It seemed too great a coincidence to have occurred purely by chance, but I could not think of any plausible explanation.

Her last words were, by a great coincidence, "Don't expect me back."

That was a great coincidence to have this building be part of that history.