This is the 284th most frequent Norwegian word.
raskt
Quickly.
Here, 'raskt' is used as an adverb modifying the verb 'løp', indicating the manner of running.
Jeg løp raskt til bussen.
I ran quickly to the bus.
In this sentence, 'raskt' describes how she noticed the error, functioning as an adverb.
Hun oppdaget raskt feilen.
She quickly noticed the error.
Here, 'raske', the adjective form of 'raskt', modifies 'responsen', describing the noun's quality.