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[µo°Ý] COUNTIF­pºâ¤£­«½Æ­È

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=COUNT(0/(MATCH(AC2:AC490,AC:AC,)=ROW(2:490))/(AC2:AC490<>"ERR"))

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¦^´_ 4# samwang


=COUNT(0/FREQUENCY(AC:AC,AC:AC))

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