Relay Specification regarding switching speed
This Panasonic relay should easily be able to switch with a 1 second cycle.

The actual maximum switching speed is not listed in the datasheet, at least, I could not find it.

I know for a fact that most relays like can switch at about 5 times per second of faster.

The numbers you did find in the datasheet are not the limits but the conditions for which other specifications are given. Note how it says "Conditions" in the first column.

So I think this relay will just work for what you want.

If you want to see that in the specification as well then I suggest looking at a different relay, for example from Omron as I have seen datasheets from them where the maximum switching speed is listed.