This is the 9494th most frequent Russian word.
успения
"Uspeniya" means "Dormition," referring to the falling asleep or death, often used in a religious context for the Virgin Mary's Assumption in Eastern Orthodox Christianity.
Here, 'Успения' is used as a proper noun referring to a religious event.
Праздник Успения отмечается в августе.
The Feast of the Assumption is celebrated in August.
In this context, 'Успения' pertains to a theological and doctrinal subject.
Толкование Успения Богородицы обсуждалось на лекции.
The interpretation of the Assumption of the Theotokos was discussed in the lecture.
Here, 'Успения' is used to denote the event of a saint's passing.