Find Most Common Occurring String Based on Lookup Value

There might be an easier looking way, but here's a formula I devised that you can use to type in the ID number you wish to view then it will automatically search through that list and only pull most common selection(s). I adjusted this so that if there was a tie it will represent both items that were picked.

Place the formula into any cell you want to use to display the returned value then set up a cell for you to input the ID you want to search for. In the below formula you will have to adjust the highlighted part of the formula (Cell E2) to point to where you put the ID you are searching for.

=CONCATENATE(IF(COUNTIFS(A:A,E2,B:B,"a")=MAX(COUNTIFS(A:A,E2,B:B,{"a","b","c"})),"a","")," ",IF(COUNTIFS(A:A,E2,B:B,"b")=MAX(COUNTIFS(A:A,E2,B:B,{"a","b","c"})),"b","")," ",IF(COUNTIFS(A:A,E2,B:B,"c")=MAX(COUNTIFS(A:A,E2,B:B,{"a","b","c"})),"c",""))

I've attached a spreadsheet that I used so you can see it in action.

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