This is the 281st most frequent German word.
wenige
Few.
Here, 'wenige' emphasizes the limited number of people who understand a complex subject.
Wenige Menschen verstehen die Tiefen der Philosophie.
Few people understand the depths of philosophy.
In this context, 'wenigen' (dative plural of 'wenige') refers to a specific but limited number of days, indicating brevity of time.
Nach den wenigen Tagen Urlaub fühlte ich mich erfrischt.
After the few days of vacation, I felt refreshed.
In this sentence, 'wenige' is used as an adjective meaning 'few', describing a small quantity of books present.