This is the 596th most frequent Norwegian word.
natten
"The night."
Here, 'natten' is used as the singular definite form of 'natt' (night), describing a specific night that is dark and quiet.
Natten var mørk og stille.
The night was dark and quiet.
In this instance, 'natten' specifies the night as the time period during which an action (snowing) occurred.
Under natten begynte det å snø.
During the night, it started to snow.
Here, 'natten' is used to identify the night as a time frame in which the subject of the sentence spent their time.