In the table command, if you list fields that do not exist, the existing fields are still listed.
In the stats command, if you try to group by fields that do not exist, you will get no results.
You need to change your search
...| stats sum(EXECUTED) as Total_Time, count as Num_of_Executions, avg(EXECUTED) as Avg_exectime, perc80(EXECUTED) as 80th_percentile BY TRANSLATION_UID,DOCUMENT_TYPE
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