This is the 4043rd most frequent Russian word.
милиция
"Militsiya" refers to the former name for the police in Russia and some other post-Soviet states prior to 2011.
Here, 'милиция' refers to the governmental law enforcement body before it was renamed 'полиция' in Russia in 2011.
Моя тётя работала в милиции.
My aunt worked in the militia.
In this sentence, 'милиция' is used as the organization responsible for public safety.
Если случился инцидент, нужно позвонить в милицию.
If an incident occurs, you should call the militia.
This context reflects 'милиция' as the name of the law enforcement agency throughout the Soviet and early Russian Federation era.