as and when

as and when

When it becomes necessary to do something. We'll worry about that issue as and when it arises, all right?
See also: and

as and when

used to refer to an uncertain future event.
1996 She The single most important strategy you can adopt to boost your energy levels is to learn to deal with an issue as and when it rears its head.
See also: and

ˌas and ˈwhen

whenever; at the moment when: We’ll deal with individual problems as and when they arise.
See also: and