at (one's) convenience

When one has the time to do something. No rush, you can fill out that paperwork at your convenience.

Name	Pronounced	Usage
Charisma	kə-RIZ-mə	English (Rare)
Khalida	-	Arabic
Kamala	-	Hinduism, Tamil, Indian, Kannada, Telugu, Hindi, Nepali
Mahmud	-	Arabic, Persian, Pashto, Bengali, Indonesian, Malay
Shraga	-	Jewish
ŠImo	-	Croatian