Counting log edits in a text field

I have a multi-line text field named [Client's referrals] that logs the edits to the field with Date, time and user. We keep track of the people a client has referred to us.

I would like to know how many people a client referred to us each month. Is there a way I can count each edit and catch the date?

Thanks!

Consuelo

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Consuelo Viramonte
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