Specifies the frequency of the recurring patch deployments.
Values:
FREQUENCY_UNSPECIFIED (0):
Invalid. A frequency must be specified.
WEEKLY (1):
Indicates that the frequency of recurrence
should be expressed in terms of weeks.
MONTHLY (2):
Indicates that the frequency of recurrence
should be expressed in terms of months.
DAILY (3):
Indicates that the frequency of recurrence
should be expressed in terms of days.