Chances are they're happening all the time, you might just not recognize it.

Some coincidences do seem truly amazing – such as cases where someone is walking past a phone box when the phone rings, and on picking it up it turns out it’s for them. In those cases, we’re forgetting that even rare events do happen, but they only seem amazing if we choose to ignore the zillions of times when, for example, people walk past a phone box and nothing amazing happens.