Thank you for reaching out to the Community! In order to see how many contacts have been added during a certain time frame, you will want to use our segment feature.
THis didn't help. But thank you.
So I have a database of customers I use. In any given week I delete those that no longer work at the customer and add new ones.
And I do this every day.
SO If I do a newsletter on September 1st, and the last newsletter was October 1st, I want to know how many new names/emails (contacts) were added since the prior month's newsletter.
I apologize that the segment feature was not what you were looking for. You will want to export your list with the "date added" section included so you can see all of the information that you need.