Heck if I know. I do assume that freak accidents occur very, very rarely within the scope of, say, somebody’s social world. However, a simple Google Alert provides some fodder for assessing how frequent these occurrences are when you have access to worldwide (or at least country-wide) information sources.

Google News Alert for: "freak accident"

‘It was a freak accident‘
Daily Press – Newport News,VA,USA
… He was not wearing a life vest. "It was a freak accident. The man was well seasoned. It’s not like he was a greenhorn. It happens with the best," Green said. …

Freak Drowning Accident Claims Elk Grove Teacher and Student
KXTV – Sacramento,CA,USA
For the second time in one year, the Elk Grove Montessori School has lost a teacher to a freak accident. One of the preschool’s …

Toddler dies in freak accident
Townsville Bulletin – Northern Australia,Australia
… She must have fallen backwards and hit her head," she said. "I think this must have just been a horrible freak accident — a terrible thing to happen.". …

Freak accident knocks out teen
Cincinnati Enquirer – Cincinnati,OH,USA
MONROE – A freak accident with a nearly-empty plastic sports-drink bottle knocked a high school football player unconscious and put him in the hospital. …

Picasso punctured by Steve Wynn’s elbow in freak accident
Monsters and Critics.com – Glasgow,UK
… The freak accident witnessed by a group that included "The View’s" Barbara Walters and screenwriters Nora Ephron and Nicholas Pileggi. …

Plane enthusiast dies in freak accident
St. Louis Post-Dispatch – MO, United States
By Heather Ratcliffe. So he became an airplane enthusiast. He hung model jets in their Webster Groves home. He named his dogs after planes. …

Man dies in freak kangaroo accident
The Australian – Sydney,Australia
A FREAK accident involving a kangaroo has claimed the life of a 50-year-old motorist in the south-west of Western Australia. Police …

Boy fights for life after freak accident
Calgary Sun – Canada
By BILL LAYE, CALGARY SUN. Childish curiosity has left a 14-year-old boy fighting for his life after he was hit by a rock spun out from the tire of a city bus. …

Stingray injures Broward boater in ‘freak accident‘
Miami Herald – FL,USA
… ”It was a freak accident,” said Lighthouse Point acting fire Chief David Donzella, whose officers first responded to the call. …

Monroe teen recovers from ‘freak accident‘
Middletown Journal – Middletown,OH,USA
… He called it a "freak accident," noting the bottle was nearly empty. "It is hard to believe it could cause that type of injury," Elam said. …