not occupied; free
清闲，不忙，有空
the rest of the day can be spent at leisure.
这天剩下的时间可以轻松度过了。
in an unhurried manner
从容地，不慌不忙地
the poems were left for others to read at leisure.
这些诗是留给别人慢慢去读的。
at one's ease or convenience
有空时，方便时
a woman or man of independent means or whose time is free from obligations to others
（经济独立或没有负担的）悠闲女士（或男士）
When one has free time; at one's convenience
当某人有自由时间时；在某人方便时
I'll return the call at my leisure.
我有空就会来拜访