Power Automate Count Ocurrences of string

Given an output like this one below, which is obtained to a graph-api call.

"value": [
        {
            "userPrincipalName": "user@doamin.com",
            "assignedLicenses": [
                {
                    "disabledPlans": [],
                    "skuId": "4b585984-651b-448a-9e53-3b10f069cf7f"
                },
                {
                    "disabledPlans": [],
                    "skuId": "26d45bd9-adf1-46cd-a9e1-51e9a5524128"
                }
            ]
        },
[....]

I would to count the ocurrences for an skuId (4b585984-651b-448a-9e53-3b10f069cf7f) for example.

I tried splitting the by the string, and counting with no luck. sub(length(split('@outputs','4b585984-651b-448a-9e53-3b10f069cf7f')),1)

Unfortunately, the build in functions do not allow conditional parsing of the arrays for counts. But this can be achieved by a simple manipulation via filter array.

Here's how you can do it. Remember to parse the value object only. In case you have multiple objects, consider using a join t merge the license arrays first before filtering by skuid