'Using delivery_frequency filter in sellingPlanGroups query

I am trying to filter for sellingPlanGroups by delivery frequency. When I am trying to use the delivery_frequency query argument I see that I am able to filter by the interval (type):

{
  sellingPlanGroups(first: 10, query:"delivery_frequency:day") {
    edges {
      node {
        id
      }
    }
  }
}

will return only the groups containing selling plans with a day interval.

But, I find no way of specifying the intervalCount. Without being able to specify the exact frequency this filter is not much of a help. Can anyone supply an example of how should I use this filter?



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