For me, the need to do this seems to happen almost instantaneously.

This all happens instantaneously as the force is applied at 3 o'clock.

The whole thing must have happened almost instantaneously.

However, the Cambrian explosion of animals that gave rise to body fossils did not happen instantaneously.

This comparison made him curious if a state-shift happened instantaneously, or slowly.

The slip did not happen instantaneously but took place in two phases over a period of several minutes:

Because the process happened nearly instantaneously, only the final sense of dismay reached full awareness.

It seemed to happen less than instantaneously, if you can imagine that.

But then I don't anticipate total fiat collapse and it happening instantaneously.

Now, what happens in there seems to happen instantaneously.