While aircraft ditchings happen many times each year, typically it only involves small private aircraft or military aircraft. Ditchings involving commercial airliners are by contrast very rare, AirSafe.com defines ditching as an event where the flight crew intentionally lands an aircraft in some body of water such as a lake, a river, or the open ocean, and the water is so deep that if the aircraft sinks, at least some of the occupants have to evacuate the aircraft to avoid drowning.
Since 1960, AirSafe.com has identified just four events involving commercial jet airliners that met this definition. The latest, and by far the most famous, was the "Miracle on the Hudson" ditching involving a US Airways A320 in 2009. While just about every modern airliner has life vests and other emergency equipment to deal with an emergency water landing, it is very, very unlikely that any passenger will every experience an intentional ditching.
Jet airliner ditching events
AirSafe.com ditching definition