同产品出现频次最大的机台 (9607)

F2{=INDEX(B:B,RIGHT(MAX(COUNTIFS(A$2:A$21,A$2:A$21,B$2:B$21,B$2:B$21)*(A$2:A$21=E2)/1%+ROW($2:$21)),2))

另解=LOOKUP(,0/FREQUENCY(-9^9,-COUNTIFS(A$2:A$89,E2,B$2:B$89,B$2:B$89)),$B$2:$B$89)