This is the 10347th most frequent Russian word.
бухгалтерии
"Бухгалтерии" means "accounting" or "bookkeeping."
The word 'бухгалтерии' here is used to denote the place or department of accounting within an organization.
Я работаю в бухгалтерии уже пять лет.
I have been working in the accounting department for five years.
In this sentence, 'бухгалтерии' refers to the department responsible for financial and accounting management.
Документы из бухгалтерии должны быть готовы к завтрашнему утру.
The documents from the accounting department must be ready by tomorrow morning.
Here, 'бухгалтерию' is in the accusative case, directed towards the department in charge of accounting tasks.