Whenever (conjunction)

1. At any time that; whenever.
2. Each time that; every time that.

Origin:

Whenever: since middle english, alteration of quhen soever, from quhen, quhen soever when soever.

Examples:

1. I'll be happy to help you whenever you need it.
2. Whenever she comes to visit, she brings us cookies.
3. Whenever there is a power cut, the generator kicks in.
4. Whenever the phone rings, she jumps.
5. Whenever he has free time, he goes for a walk.