setki

In a sentence

• Widziałem setki ptaków na niebie.

  I saw hundreds of birds in the sky.

  Here, 'setki' is used as a noun meaning 'hundreds', indicating a large number of birds.

• Lubię setki razy oglądać ten film.

  I like watching this movie hundreds of times.

  In this sentence, 'setki' is used to express a repeated action done many times, again meaning 'hundreds' as a quantifier.

• W katalogu znalazłem setki interesujących zdjęć.

  I found hundreds of interesting pictures in the catalog.

  Here, 'setki' quantifies 'interesujących zdjęć' (interesting pictures), emphasizing the abundance.