This is the 951st most frequent Danish word.
tusindvis
"Thousands" or "thousands of."
The word 'tusindvis' in this sentence is used as a quantifier to indicate a large approximate number, referring to an immense and uncountable quantity of stars observed.
Jeg har set tusindvis af stjerner på himlen i nat.
I saw thousands of stars in the sky tonight.
Here 'tusindvis' functions to underscore the idea of a massive crowd attending the concert, emphasizing the overwhelming size of the gathering.
Der var tusindvis af mennesker til koncerten.
There were thousands of people at the concert.
In this context, 'tusindvis' highlights the extensive selection of books available, suggesting an abundance that provides a wealth of choices.