add countblank to table.profile

Try this Anonymous 

I don't think you can have blanks for numerical fields - they get converted to nulls, and you cannot replace values with blanks, so I am assuming this is text. 

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WSlTSUTIEYhOlWJ1opSQUXjKUB+akgBhQNoRpCGanQRUBebEA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Data 1" = _t, #"Data 2" = _t, #"Data 3" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Data 2", type number}, {"Data 3", type number}}),
    Custom1 = 
        Table.Profile(
            #"Changed Type",
                {
                    {
                        "Blanks", each Type.Is(_, type nullable any),  each List.Count(List.Select(_, each _ = ""))
                    }
                }
        )
in
    Custom1

This is my dummy data:

And this is the result. Note: I removed a bunch of columns Table.Profile generates to get this screenshot: