at one's leisure

at leisure

1. When one has the time to do something. In this usage, a possessive pronoun is used between "at" and "leisure." No rush, you can fill out that paperwork at your leisure.
2. In a relaxed manner. I like to spend my weekends reading at leisure.
3. With free time; unoccupied. I just graduated from college—can't I spend some time at leisure?
See also: leisure
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

at one's leisure

Whenever one wishes, at one's convenience, as in At your leisure, please look over this manuscript and give me your comments. [1400s] Also see at leisure.
See also: leisure
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
See also:
References in classic literature ?
One can walk along at one's leisure behind that cow--keep good company, and have milk, butter, and cheese, every day, into the bargain.