Question

Can i say this sentence, is this sentence grammatically correct. Can i add it in my essay?

The sentence is:


After 4 years, a coincidence no one ever thought would happen, happened.

Answer 1

No. That's not grammatically correct. However, a suitable alternative could be these sentences-
"No one ever thought it would happen. But it did, after four years, by pure coincidence."
Tip: When mentioning numbers under ten, type them out in word form,

Answer 2

i say forget the comma and put it in your essay.