Wat is m1 - just a string or the cell M1?
COUNTIF should work too. As you say, SEARCH will certainly work:
=SUMPRODUCT(ISNUMBER(SEARCH(T$4&U$4&"??16??m1",AK52:AK35533))+0)
Care to provide a string from AK, a value from T4, and a from U4 for testing, where COUNTIF fails?
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Every COUNTIF returns a 0 when I know it's not the case.
That said, your formula worked, but now every time I enter and update the info in AK, it goes from about 16 seconds to almost 45 seconds. Is there a different way of writing that formula work a little faster? FYI, my spreadsheet is about 35k rows by 150 columns... thanks!
THANK YOU! It did work.
Out of curiosity, here's how I had done it, compared to yours which worked: what's the difference?
Me: =COUNTIF(AK52:AK35533,CONCATENATE(T$4,U$4,"??16??m1"))
Yours: =COUNTIF($AK$52:$AK$35533,"*"&T$4&U$4&"??16??m1"&"*")