diff --git a/stats/models.py b/stats/models.py
index c7466b26..bac0060b 100644
--- a/stats/models.py
+++ b/stats/models.py
@@ -26,6 +26,27 @@ def for_question(self, question_id):
     def from_quiz(self):
         return self.filter(source=constants.QUESTION_SOURCE_QUIZ)
 
+    def agg_count(
+        self,
+        since="total",
+        week_or_month_iso_number=None,
+        year=None,
+    ):
+        queryset = self
+        # since
+        if since not in constants.AGGREGATION_SINCE_CHOICE_LIST:
+            raise ValueError(f"DailyStat agg_count: must be one of {constants.AGGREGATION_SINCE_CHOICE_LIST}")
+        if since == "last_30_days":
+            queryset = queryset.filter(created__date__gte=(date.today() - timedelta(days=30)))
+        if since == "month":
+            queryset = queryset.filter(created__month=week_or_month_iso_number)
+        elif since == "week":
+            queryset = queryset.filter(created__week=week_or_month_iso_number)
+        if year:
+            queryset = queryset.filter(created__year=year)
+        # field
+        return queryset.count()
+
     def agg_timeseries(self):
         queryset = self
         queryset = (
@@ -109,6 +130,27 @@ def for_quiz(self, quiz_id):
     def last_30_days(self):
         return self.filter(created__date__gte=(date.today() - timedelta(days=30)))
 
+    def agg_count(
+        self,
+        since="total",
+        week_or_month_iso_number=None,
+        year=None,
+    ):
+        queryset = self
+        # since
+        if since not in constants.AGGREGATION_SINCE_CHOICE_LIST:
+            raise ValueError(f"DailyStat agg_count: must be one of {constants.AGGREGATION_SINCE_CHOICE_LIST}")
+        if since == "last_30_days":
+            queryset = queryset.filter(created__date__gte=(date.today() - timedelta(days=30)))
+        if since == "month":
+            queryset = queryset.filter(created__month=week_or_month_iso_number)
+        elif since == "week":
+            queryset = queryset.filter(created__week=week_or_month_iso_number)
+        if year:
+            queryset = queryset.filter(created__year=year)
+        # field
+        return queryset.count()
+
     def agg_timeseries(self, scale="day"):
         queryset = self
         # scale
diff --git a/stats/tests/test_models.py b/stats/tests/test_models.py
index 0dba70cc..0089967b 100644
--- a/stats/tests/test_models.py
+++ b/stats/tests/test_models.py
@@ -1,4 +1,7 @@
+from datetime import timedelta
+
 from django.test import TestCase
+from django.utils import timezone
 
 from core import constants
 from questions.factories import QuestionFactory
@@ -15,6 +18,9 @@
 )
 
 
+datetime_50_days_ago = timezone.now() - timedelta(days=50)
+
+
 class QuestionStatTest(TestCase):
     @classmethod
     def setUpTestData(cls):
@@ -28,9 +34,16 @@ def setUpTestData(cls):
         cls.question_rm_1 = QuestionFactory(type=constants.QUESTION_TYPE_QCM_RM, answer_correct="ab")
         cls.question_rm_2 = QuestionFactory(type=constants.QUESTION_TYPE_QCM_RM, answer_correct="abc")
         cls.question_rm_3 = QuestionFactory(type=constants.QUESTION_TYPE_QCM_RM, answer_correct="abcd")
-        QuestionAnswerEvent.objects.create(question_id=cls.question_rm_1.id, choice="cd", source="question")
+        QuestionAnswerEvent.objects.create(
+            question_id=cls.question_rm_1.id, choice="cd", source="question", created=datetime_50_days_ago
+        )
         cls.question_vf = QuestionFactory(type=constants.QUESTION_TYPE_VF, answer_correct="b")
 
+    def test_question_answer_event_agg_count(self):
+        self.assertEqual(QuestionAnswerEvent.objects.count(), 2)
+        self.assertEqual(QuestionAnswerEvent.objects.agg_count(), 2)
+        self.assertEqual(QuestionAnswerEvent.objects.agg_count("last_30_days"), 1)
+
     def test_question_agg_stat_created(self):
         self.assertEqual(Question.objects.count(), 1 + 3 + 1)
         self.assertEqual(QuestionAggStat.objects.count(), 1 + 3 + 1)
@@ -54,9 +67,14 @@ def setUpTestData(cls):
         cls.quiz_1 = QuizFactory(name="quiz 1")  # questions=[cls.question_1.id]
         QuizQuestion.objects.create(quiz=cls.quiz_1, question=cls.question_1)
         QuestionAnswerEvent.objects.create(question_id=cls.question_1.id, choice="a", source="question")
-        QuizAnswerEvent.objects.create(quiz_id=cls.quiz_1.id, answer_success_count=1)
+        QuizAnswerEvent.objects.create(quiz_id=cls.quiz_1.id, answer_success_count=1, created=datetime_50_days_ago)
         QuizFeedbackEvent.objects.create(quiz_id=cls.quiz_1.id, choice="dislike")
 
+    def test_quiz_answer_event_agg_count(self):
+        self.assertEqual(QuizAnswerEvent.objects.count(), 1)
+        self.assertEqual(QuizAnswerEvent.objects.agg_count(), 1)
+        self.assertEqual(QuizAnswerEvent.objects.agg_count("last_30_days"), 0)
+
     def test_answer_count(self):
         self.assertEqual(self.quiz_1.answer_count_agg, 1)