This is the 12982nd most frequent Swedish word.
sällan
Sällan: Rarely.
The word 'sällan' is used as an adverb modifying the verb 'går', indicating the infrequency of the action of going.
Jag går sällan till stranden.
I rarely go to the beach.
Here, 'sällan' functions as an adjective describing 'skådad' to emphasize the rare nature of the event.
Det är en sällan skådad händelse.
It is a rarely seen event.
In this sentence, 'sällan' is used as an adverb modifying the adjective 'upprörd', indicating the uncommon occurrence of the described emotional state.