How to Repeat Rows in a Table and Add Index in Power Query

How to Repeat Rows based on a Column and Add Index in Power Query

Scenario:
Suppose we have the sample data as follows:

Now from above data, based on the [Freq] column, we have to repeat the rows and add Index.
Eg: 

If [Freq] =3 then we have to repeat that row for 3 times and then need to add a Index column with values as 1,2,3.

We can achieve this Scenario, using the following M-Query:

let

    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("Zc3bCQAhDETRXvItmInxVYvYfxuyGwNL9m/gwNy1CFKUEgFZszD42bTTC9WgOohDM2gOxaEbdAd1GAbj15gGM14pG4BjXXEFsaJyRT6ZfQA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [ProdID = _t, DateKey = _t, Freq = _t]),

ChangeType = 

Table.TransformColumnTypes(Source,{{"ProdID", Int64.Type}, {"DateKey", type date}, {"Freq", Int64.Type}}),

RepeatRowsIndex = 

Table.AddColumn(ChangeType, "tempField", each 

Table.AddIndexColumn(

Table.Repeat(Table.FromRecords({[temp=null]}),[Freq]),"Index",1,1, Int16.Type)),

ExpandRows = Table.ExpandTableColumn(RepeatRowsIndex, "tempField", {"Index"}, {"Index"})

in

    ExpandRows

Result:

Thanks, TAMATAM