If the standing instruction Frequency is monthly, there are two choices, "Monthly by Day" and "Monthly by Week."
"Monthly by Day":
Specify the frequency by day by entering the day of the month (1-31) in the Frequency Day field and the monthly period (1-n) in the Frequency Month field.
"Monthly by Week":
Specify the frequency by month and weekday by entering the week (1-5) in the Frequency Week field, the day (Monday-01, Tuesday -02, through Saturday-06) in the Frequency Day field, and the month (number of months) in the Frequency Month field.