This is the 2210th most frequent Russian word.
гривень
The Russian word "гривень" refers to "hryvnias," the currency of Ukraine.
The word 'гривень' in this sentence is in the genitive plural form, referring to a number of Ukrainian currency units.
У меня есть сто гривень в кошельке.
I have a hundred hryvnias in my wallet.
Here, 'гривень' is used in the genitive plural form when describing amounts of currency.
Я заплатил пять гривень за этот чай.
I paid five hryvnias for this tea.
In this sentence, 'гривень' is used in the same plural genitive case commonly used after quantitative questions.