Definition
When one has the time and is inclined to do something; at one's own convenience.
有空时
Please review the contract at your leisure.
请在您方便的时候审阅合同。
You can browse these books at your leisure, there is no time limit.
您可以随意浏览这些书籍，没有时间限制。
I will respond to your email at my leisure.
我会在方便的时候回复您的电子邮件。