This is the 1047th most frequent Russian word.
нападения
"Attack" or "assault."
Here, 'нападении' (a form of 'нападение') is used to denote a physical or verbal attack against a person.
Он сообщил полиции о нападении на него.
He reported the attack on him to the police.
'Нападениях' is used in plural form to describe events where there were multiple attacks against a location.
Книга рассказывает об исторических нападениях на город.
The book narrates historical attacks on the city.
In this sentence, 'нападений' refers to potential attacks, expressing possibility or likelihood.