Calculate Time to Schedule Weekly Averages

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I want to calculate weekly averages for scheduled appointments. I want to show that weekly averages are taking longer to schedule over time. This is the formula I have so far:

=AVERAGEIF({Average Time to Schedule}, COLLECT({OBOT Referrals Month}, @cell = 11, {OBOT Referrals Year}, @cell = 2022, {OBOT Referrals Day}, AND(@cell >= 20, @cell <= 26))

I keep receiving the error message: #NESTED CRITERIA.

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