Usage patterns
平穏な日々を送るto live/spend peaceful days
Since retiring, I've been living a peaceful daily life.
平穏を保つto maintain peace/calm
The police patrol to maintain peace in the town.
平穏を乱すto disturb the peace/calm
The incident disturbed the peace of the village.
平穏に暮らすto live peacefully
They live peacefully in the countryside.