Does the Rocket Artillery callers get the "Frequent artillery" class upgarde?

I was testing out the squads and noticed the cooldown on them was the same as when it calls down normal artillery.
Though both didn’t seem to have the shortened cooldown.

And since I can’t actually check the squads’ upgrades without buying the squad. I’d like to ask anyone who knows/has them.
Do they? Because the idea of 2 minute rocket calls sounds kinda appealing.

Yes, I own the Soviet premium and all the event rocket artillery ones. Last time I played with them I had 2 minutes between rocket strikes. By the time the first rocket hit it was around the 1:36 mark so it’s honestly closer to 1 minute and 36 seconds with a 24-30 second call time before the strike starts.

In short, all rocket arty squads get 2 minute rocket calls. Just keep in mind the rockets don’t come in straight they are angled so it has uses if you can manage to get the direction right to fire into buildings through doors and windows same for vehicles of you can hit them in the engine or side you cause serious damage. I think it was a 30 degree angle if I remember right so it makes it harder to use in places like far east and other places with streets tightly packed with buildings but it’s still easy to get 10-15 kills in a single strike if it’s spamming a objective building that’s on a tiny street surrounded by buildings if you place your strike well.