How long does it usually take HR to send an offer

Hi monkeys,

So I'm currently in the process for an M&A analyst position with a BB here in Latam, already had multiple interviews, 2 analysts, 1 associate, 1 VP, country head and head of latam, also passed the modeling test and recently had the interview with HR, it's been a week and haven't received an offer yet and was just wondering how long does it usually take HR do the background check and send the formal offer. The whole process has taken a month and a half until now and the waiting is making me anxious. Please note that their HR team is not based in the country I would be working from.