This is the 705th most frequent Serbian word.
трећег
The Serbian word "трећег" means "of the third" in English (genitive singular form).
In this context, 'трећег' specifies a chronological order in the sense of 'third.'
Састала сам се са њим прошлог трећег месеца.
I met him last third month.
Here, 'трећег' denotes a serial position, referring to 'the third day' within a sequence of days.
Били смо у посети његовом брату трећег дана путовања.
We visited his brother on the third day of the trip.
In this case, 'трећег' pertains to an ordinal indication, referencing 'the third birthday.'