Moves this big are not frequent. It was the 94th time the Dow dropped at least 3% in a day since 1950. That is 94 out of more than 17,600 trading days.
Some Perspective on The Stock Market's Wild Day
Days like this are unpleasant. Unfortunately they are part of the journey. Thankfully they are a small part.
The Dow Jones Industrial Average is still up over 9% for 2019.