This is the 160th most frequent Polish word.
zostało
"Zostało" means "remained" or "was left" in English.
In this sentence, 'zostało' is used to indicate that a certain amount of money remains.
W skarbonce zostało pięć złotych.
There are five zlotys left in the piggy bank.
In this usage, 'zostało' expresses the scarcity of time remaining.
Zostało już bardzo mało czasu na ukończenie projektu.
Very little time is left to complete the project.
Here, 'zostało' is used to describe something that persisted or stayed in people's memory.