180 days loop

Hey everyone,

I have a table with thosuands of parts that are received into our system. 

Let's say Column A is the ItemID which is the part number and Column B is the Date that was received.

My goal is to check if a given part has entered into our system more than 5 times in a given 180 days period. So, at this point, I made something that works but it only checks for the last 180 days from today. I want to build something that can check for any 180 days for 5 batches received.

So, let's say if one part was received for 5 times between Jan 1st and July 1st for 5 times back in 2020, I want to flag that part.

Here is my current code with the 180 days from today thing.

#"Filtered Rows1" = Table.SelectRows(#"Filtered Rows", each [CREATEDDATETIME] > DateTime.LocalNow() - #duration(180, 0, 0, 0)),
#"Grouped Rows" = Table.Group(#"Filtered Rows1", {"ItemId", "ItemName"}, {{"Count", each Table.RowCount(_), Int64.Type}}),
#"Filtered Rows2" = Table.SelectRows(#"Grouped Rows", each [Count] >= 5)