I get a free report from each every January to make sure there is nothing amiss - but it has no scores
For scores, I track my Equifax only on a regular basis via MyFICO. It also happens to be my middle score. The others I pull once a year. Next year I will be pulling specific ones to check that adverse reports have actually dropped off, and to see the effect on my scores as they wither away

I know which reports are going to be pulled when I move house and get a new mortgage, and I intend to get no new credit other than that, so that keeps me on top of things enough at the moment. The money I save by not pulling scores keeps my utilization low

And the momthly payment to MyFICO keeps one credit card ticking over.
The slide from grace is really more like gliding
And I've found the trick is not to stop the sliding
But to find a graceful way of staying slid