This is the 593rd most frequent Russian word.
рубля
The word "рубля" is the genitive singular or accusative singular form of "рубль," meaning "ruble," the currency of Russia.
"Рубля" is in the genitive singular case, indicating possession or the lack of something.
У меня нет рубля в кармане.
I don't have a ruble in my pocket.
"Рубля" appears to be an incorrect form here; after 'один', the nominative should be used; the correct form would be "рубль".
Мне дали сдачу две копейки и один рубля.
I was given change of two kopecks and one ruble.
"Рубля" is in the genitive singular used in numerical expressions when combined with the numeral three, employing the case after such a numeral.