To understand how Site Recovery generates recovery points, let's see an example of a replication policy. This replication policy has a recovery point with a 1-day retention window and an app-consistent frequency snapshot of 1 hour.
Site Recovery creates a crash-consistent recovery point every 5 minutes. You can't change this frequency. For the most recent 2 hours, you can choose from 24 crash-consistent points and 2 app-consistent points. As time progresses, Site Recovery prunes all the recovery points beyond the last 2 hours and saves only one recovery point per hour for up to 24 hours of the day.
The following screenshot illustrates the example. In the screenshot:
Within the past 2 hours, there are recovery points with a frequency of 5 minutes.
Beyond the past 2 hours, Site Recovery keeps only one recovery point per hour.