Przypadek in English:

What a coincidence!

We happened to meet again through a strange coincidence.

It was a coincidence that both boys were called 'Jim' by their new parents.

It was pure coincidence that we both married dentists.

What a coincidence! / That's an amazing coincidence.

This appointment was a trully coincidence.

Series of random coincidences

Mr. Berry said the timing was a coincidence and that his decision was unrelated to Mr. Roman's departure.

„it's no coincidence that ..., by coincidence = przez zbieg okoliczności

It was rather a coincidence that she appeared at that exact moment.

Both at Harvard – that's a coincidence.

Is it a pure coincidence that the wife of the man who designed the competition won first prize?

An example of a coincidence is when you unexpectedly run into your friend in the mall.

'I'm going to Appleby tomorrow.' 'What a coincidence! I'm going up there too.'

Is it mere coincidence that "banality", when anagrammed, reads "Ban Italy"?