by accident

by accident

Mistakenly or unintentionally. Oh geez, I must have left those files out by accident. Many great scientific discoveries happened entirely by accident.
See also: accident, by

by ˈaccident

in a way that is not planned or organized: We met by accident at the airport.Helen got into acting purely by accident.
See also: accident, by
References in classic literature ?
Indeed, two very necessary words were clearly dropped by accident.
If she slipped, by accident, from off the Spit, she fell in where there's foothold at the bottom, at a depth that would barely cover her to the waist.
The locations should be prioritized by accident rate so that the locations with the highest rate are listed at the top.
And what about the "pain and suffering' endured by accident victims like Robert Demichelis who can't blame their fate on someone else?
If, as Lord Falconer has predicted, large well known retailers, supermarkets and banks enter into the provision of legal services, along with the AA and RAC, then they stand to significantly increase the current level of competition in the market place and reduce the market share held by accident intermediaries and solicitor firms
We are excited to be considered by Accident Prevention Plus and look forward to ensure that the investment community recognizes the compelling, fundamental value proposition that this company represents," concluded Batson.