You can take a break - 你能休息一下。 - 你可以休息一下。 - 你可以歇一会。 闲暇 can be translated as "free time".

hum~~ 闲 is an adjective,【You can enjoy your leisured time,你可以享受你的闲时光】 "take a break" is something sounds casually,:},so you can use 休息一下,that's fine enough.But I‘m glad to find out you are trying to get a better and sophiscated statement,加油哦！

sorry u can't 你可以少闲 is wrong. We generally use 闲 as a adj. 闲 means not busy or get nothing to do. Free time is 空闲时间. 闲 is still a adj.

no.