This is the 13778th most frequent German word.
ereignet
"Occurs" or "happens."
Here, 'ereignet' refers to an incident happening in the past tense.
Ein Unfall hat sich auf der Autobahn ereignet.
An accident occurred on the highway.
In this usage, 'ereignet' signifies an unusual event taking place.
Es ereignet sich selten, dass ein Regenbogen in der Nacht sichtbar ist.
It rarely happens that a rainbow is visible at night.
This context uses 'ereignet' to describe a specific repeated occurrence of an event.