If you have rows in a repeater with specifc values, enter the following in the OnSave Formula:

cast(XmlField1 as xml).value('count(!Xpath!)', 'varchar(50)')

and the following in the Add a repeater xpath field:

//RepeaterData/Repeat/*[@DatabaseValue="TextField2" and @Value="Rate2"]

Thiis assumes your repeater looks like this:
  <Repeat UserID="1014">
    <Data LabelText="Record Day or Hour" DatabaseValue="TextField2" Name="Record Day or Hour" Value="Rate2" />
  </Repeat>