Get the most present elements from many fields
You can use derive table to aggregate all your column values in a single column and do ordering and counting in the derived table. Example below.

Select item0 as item, count(*) as cnt from
(SELECT item0 from finalBuild
UNION ALL
SELECT item1 from finalBuild
UNION ALL
SELECT item2 from finalBuild) as item
group by item0
order by count(*) desc;