This is the 3228th most frequent Russian word.
ночи
"Ночи" means "nights" in English.
'nochi' is used in the plural genitive case in this sentence as the complement of the adjective 'темные' (dark), functioning as the subject in its descriptive plural form.
В тёмные ночи звёзды особенно яркие.
On dark nights, the stars are especially bright.
'nochi' is used in the singular genitive case to indicate possession or belonging, referring to the silence associated with 'night'.
Я люблю слушать тишину ночи.
I love listening to the silence of the night.
'nochi' is used in the singular genitive case to indicate time within the prepositional phrase, specifying when the action occurs.