This is the 17758th most frequent Russian word.
укрытии
Shelter or hiding place.
Here, "укрытие" refers to a physical shelter or place of cover from external conditions, like rain.
Во время дождя они нашли укрытие под старым деревом.
During the rain, they found shelter under an old tree.
In this context, "укрытие" signifies a concealed location where soldiers protect themselves from detection or danger.
В укрытии от врага солдаты ожидали приказа.
In hiding from the enemy, the soldiers awaited orders.
This usage shows "укрытие" as the physical structure or space used for protection or refuge, with emphasis on the act of taking cover.