Happenstance (noun)

An occurrence or event that happens by chance.

Origin:

From the combination of the words happen + circumstance, which means an event or occurrence that takes place by chance.

Examples:

1. We met by happenstance at the coffee shop.
2. It was just a happenstance that we were both at the same place at the same time.
3. Happenstance led him to his true calling in life.
4. The meeting was a happenstance, it was not planned.
5. It was happenstance that I found that book, I was not looking for it.