This is the 7543rd most frequent Russian word.
доволенском
The word "доволенском" does not exist in Russian. It might be a typo or misinterpretation.
Here, 'Доволенском' refers to the name of the settlement where the speaker lived, used as a proper noun in locative case.
Я жил в посёлке Доволенском три года.
I lived in the Dovolensky settlement for three years.
The term 'доволенском' is utilized as an attributive adjective to modify 'парке', indicating the park's location within the Dovolensky area.
Мы встретили друга в доволенском парке.
We met a friend in the Dovolensky park.
In this sentence, 'доволенского' functions as an adjective describing 'района', specifying a district in Dovolensky.