References in classic literature ?
It was evident that the three daughters had grown up as they could and had had just as little haphazard instruction as qualified them to be their father's playthings in his idlest hours.
My wilful actions and acquisitions are but roving;--the idlest reverie, the faintest native emotion, command my curiosity and respect.
Cheveley, allow me to introduce to you Lord Goring, the idlest man in London.
If a multiple time slot spectrum can be predicted, the SU can choose the idlest channel and combine the spectrum resources from multiple channels, which increases the flexibility of the spectrum utilization.