happen

Change doesn't happen overnight.

You have to make things happen.

It's the best thing that has ever happened to me.

What's happened to your car?

happen to be/dosomething 

She happened to be out when we called.

"I happened to see your brother at the park this morning."

"She happened to pick the exact same dress for the party as her best friend."

"They happened to arrive at the airport just in time to catch their flight."

By Chance:

"By chance, I ran into my old teacher at the bookstore yesterday."

"She found the missing puzzle piece by chance under the couch."

"It was purely by chance that we chose the same vacation destination as our friends."

Take Place:

"The wedding will take place in a beautiful garden."

"The conference is scheduled to take place next week."

"come about"

Can you tell me how the accident came about?

"The idea for the new product came about during a brainstorming session