This is the context:

In my pessimistic moments, I think that in 10 years string theory is not going to be complete, because what's going to have to happen is a genius is going to have to appear and that doesn't occur on anybody's time clock.

I searched for it and didn't find anything useful except these examples:

They were up at 9, not on anybody's time clock but their own. Freckles: Angel on Her Shoulder By Eric G. Waggoner

or

Bart, wait here a few moments and talk to jerry. Up here. Where it's safe. You're not on anybody's time clock right now. Paradise Mine By Charles Bright

Can anyone help?

This is the context:

In my pessimistic moments, I think that in 10 years string theory is not going to be complete, because what's going to have to happen is a genius is going to have to appear and that doesn't occur on anybody's time clock.

I searched for it and didn't find anything useful except these examples:

They were up at 9, not on anybody's time clock but their own.

^{Freckles: Angel on Her Shoulder By Eric G. Waggoner}

or

Bart, wait here a few moments and talk to Jerry. Up here. Where it's safe. You're not on anybody's time clock right now.

^{Paradise Mine By Charles Bright}

Can anyone help?