Could you clarify what it means to have 100 submissions for the free level?

Could you clarify what it means to have 100 submissions for the free level? Is that in a year?

I understand that you are referring to this account limit of accounts on a free subscription.

The limit refers to the number of submissions your account is allowed to receive in a month. The limit resets every first of the month. For more information about your account usages and limits, you may refer to this guide.

Understanding-Your-Account-Usage-Limits

Feel free to let us know if you need any further assistance.