This is the 802nd most frequent Italian word.
quarto
"Quarto" in Italian means "fourth" or "quarter."
In this sentence, 'quarto' is used as an ordinal number to specify a sequence or order.
Sono rimasto nella stanza del quarto alloggio.
I stayed in the room of the fourth lodging.
Here, 'quarto' indicates a fraction, specifically one-fourth of a whole.
Un quarto del dolce era sparito.
A quarter of the dessert was gone.
In this context, 'quarto' is used to denote fifteen minutes, commonly in time expressions.