This is a marketing plan that doesn't happen by accident.

You see, she doesn't think it's happening by chance or accident.

Her moment in history happened, oddly enough, almost by accident.

I can scarcely believe it could have happened by accident.

After all, this was the game; things didn't happen just by accident.

There are no rules, but nothing here happened by accident.

The discovery of the site happened by accident in 1996.

And I do not believe this has happened by accident.

"She might have happened on the scarf by accident and used it without his knowledge."

This means that babies and families do not happen by accident.