This is the 1685th most frequent Portuguese word.
bilhetes
Tickets.
In this sentence, 'bilhetes' refers to 'tickets' as physical items needed for access to an event.
Comprei dois bilhetes para o concerto hoje à noite.
I bought two tickets for the concert tonight.
Here, 'bilhetes' means 'notes' or 'written messages' used for communication.
Mandei bilhetes aos meus amigos convidando-os para a festa.
I sent notes to my friends inviting them to the party.
'Bilhetes' is used in the context of 'tickets' specific to travel passes for public transportation.