This is the 3553rd most frequent Dutch word.
overdag
"Overdag" means "during the day."
Here, 'overdag' refers to the general timeframe of the daytime hours contrasted with nighttime.
Ik werk meestal overdag en slaap 's nachts.
I usually work during the daytime and sleep at night.
In this example, 'overdag' is used to indicate the period of the day, distinguishing it from the evening hours.
Overdag is het meestal drukker op de wegen dan 's avonds.
During the day, it is usually busier on the roads than in the evening.
The word 'overdag' here specifies that the opening hours of the shops are within the daytime.