diff --git a/anki_helpers/__init__.py b/anki_helpers/__init__.py
deleted file mode 100644
index e69de29bb..000000000
diff --git a/anki_helpers/activity.py b/pylib/anki/anki_helpers/activity.py
similarity index 75%
rename from anki_helpers/activity.py
rename to pylib/anki/anki_helpers/activity.py
index 79ddc200e..7cad14c76 100644
--- a/anki_helpers/activity.py
+++ b/pylib/anki/anki_helpers/activity.py
@@ -1,7 +1,7 @@
-import time
 from collections import defaultdict
-from typing import DefaultDict
-def analyze_activity(col, days=30):
+from typing import Dict
+
+def analyze_activity(col, days=30) -> Dict[str, int]:
     day_cutoff = col.sched.day_cutoff
     start_time = day_cutoff - days * 86400
     start_ts = start_time * 1000  # ms
@@ -14,14 +14,14 @@ def analyze_activity(col, days=30):
         start_ts,
     )
 
-    days_dict = defaultdict(int)
+    days_dict: Dict[int, int] = defaultdict(int)
     for (id,) in rows:
         day = int((id / 1000) // 86400)
         days_dict[day] += 1
 
     total_days = len(days_dict)
     average_per_day = sum(days_dict.values()) / days
-    low_days = sum(1 for v in days_dict.values() if v < 10)  # z. B. Schwelle
+    low_days = sum(1 for v in days_dict.values() if v < 10)
 
     return {
         "active_days": total_days,