This is the 7624th most frequent Russian word.
есенина
"Есенина" is not a standalone word; it typically refers to the surname of the Russian poet Sergei Yesenin or is used in contexts related to him.
Есенина is used as the genitive case of Есенин, referring to the poet's (Yesenin's) poems.
В прошлом году я читал сборник стихов Есенина.
Last year, I read a collection of poems by Yesenin.
Есенина is used in the genitive case to indicate the poetry associated with Yesenin.
На концерте прозвучала песня на стихи Есенина.
At the concert, a song set to Yesenin's poetry was performed.
Есенина is again used in the genitive case, associating the museum with the poet Yesenin.