With Metrics As
(
Select T1.Client, T1.Type
, Min(eci_Date) As FirstCallDate
From Table1 As T1
Group By T1.Client, T1.Type
)
Select DateAdd(d, DateDiff(d,0,T1.eci_date), 0) As [Day], Type, Count(*) As TotalCalls
, (
Select Count(*)
From Table1 As T2
Join Metrics As M2
On M2.Client = T2.Client
And M2.Type = T2.Type
Where T2.eci_Date >= DateAdd(mi,15,M2.FirstCallDate)
And T2.eci_date <= DateAdd(d,15,M2.FirstCallDate)
And DateAdd(d, DateDiff(d,0,T1.eci_date), 0) = DateAdd(d, DateDiff(d,0,T2.eci_date), 0)
) As Total_Repeats
From Table1 As T1
Group By DateAdd(d, DateDiff(d,0,T1.eci_date), 0), Type
Order By [Day] Asc, Type Desc
SQL Fiddle