This is the 1889th most frequent Russian word.
пользования
"Usage" or "use."
'Пользования' is used here in a genitive form as part of the phrase 'правила пользования', indicating ownership or possession of the described action, which is 'usage'.
Инструкция описывает правила пользования этим устройством.
The manual describes the rules for using this device.
Here, 'пользования' is used in the genitive case to describe 'правильного пользования', specifying the nature of the 'usage'.
Для правильного пользования системой необходимо обучение.
Training is necessary for the correct use of the system.
In this instance, 'пользования' is part of the phrase 'условиями пользования', indicating the terms or conditions under which something is utilized.