空闲 (kòng xián): free, leisure; free time

I don't have any free time on weekends; I need to take care of the kids at home and also clean the house.

He is busy with work every day and hardly has any free time to spend with his family.

When I have free time, I want to go for a walk in the park or have coffee with friends.

After retiring, he had more free time and started learning to paint and grow flowers.