Is there any way to get a count from a divert target?

I'm trying to write a function to decide whether to hide or show a choice based on two factors— how many times a given knot has been seen, and the TURNS_SINCE it has been seen. I want to do something like this:

```
=== function ValidChoice(-> startNode, minTurnsBetween, maxRepeats)
~ return TURNS_SINCE(startNode) > minTurnsBetween && COUNT(startNode) <= maxRepeats
```

Something like this COUNT function that can operate like TURNS_SINCE on a divert target doesn't exist, does it?