1 files changed, 10 insertions, 0 deletions

diff --git a/src/mailman/interfaces/digests.py b/src/mailman/interfaces/digests.py
index 98d037e09..9c224d4b5 100644
--- a/src/mailman/interfaces/digests.py
+++ b/src/mailman/interfaces/digests.py
@@ -25,10 +25,20 @@ __all__ = [
     ]
 
 
+from munepy import Enum
 from zope.interface import Interface, Attribute
 
 
 
+class DigestFrequency(Enum):
+    yearly = 0
+    monthly = 1
+    quarterly = 2
+    weekly = 3
+    daily = 4
+
+
+
 class IOneLastDigest(Interface):
     """Users who should receive one last digest."""