Crystallization Frequency (CF) is the frequency at which the ATSR Fee is qualified based on HoH model.

In the context of investment performance management, CF refers to how often we check on the progress of a MSA to see if its eligible for Settlement. It's like checking the height of a plant you've been growing in your garden. You might check it every day to see if it's getting taller, or you might check it once a week or once a month.