"again whenever" is correct and usable in written English.
This phrase can be used to indicate that something happens or will happen multiple times. For example: "I will make dinner again whenever you're hungry."
"You have that faraway look again," whenever there's something more interesting happening on my screen.
Achilles triumphed only once, but Homer triumphs again and again, whenever we read him.
But what makes them mad is that they are repeated, again and again, whenever they fail.
You'll have to moisten your hands again whenever the mixture begins to stick to them.
She's right that her physical attributes come up again and again whenever she is interviewed or written about.
In fact, we recorded the service so they can listen to it again whenever they want to".
The reward comes when business travelers take to the skies in great numbers again, whenever that may be.
El Duque begins to flip the pages again, halting whenever he notices the name of a defector who might be familiar.
I'm not sure I'd ever do something like this again, and whenever I tell the story of my Twitter computer repair I marvel at the crazy trust it took — and frankly, my luck that @MrMoustache was a good guy and not a crook.
If that demand does not materialise, the next lot of cutting could be the most painful yet.If big firms are unlikely to start hiring again briskly whenever the economy revives, what about smaller ones, which have, after all, long been a far greater source of new jobs?
After that, the right time to follow up again is whenever you have new value to offer.
