What is the default interval for how often the dynamic database of the Cisco ASA botnet traffic filter is updated from Cisco/lronPort?

What is the default interval for how often the dynamic database of the Cisco ASA botnet traffic filter is updated from Cisco/lronPort?

A.
every 5 minutes

B.
every 15 minutes

C.
every 30 minutes

D.
every 1 hour

E.
every 12 hours

F.
every 24 hours