diff --git a/src/app/domain/statistic.py b/src/app/domain/statistic.py
index 6274dc3..7123bcb 100644
--- a/src/app/domain/statistic.py
+++ b/src/app/domain/statistic.py
@@ -5,3 +5,4 @@
 class Statistic:
     costs_sum: int
     categories_costs: dict[int, int]
+    costs_num_by_days: dict[str, int]
diff --git a/src/app/services/statistic.py b/src/app/services/statistic.py
index 2debe21..8ee5bb5 100644
--- a/src/app/services/statistic.py
+++ b/src/app/services/statistic.py
@@ -1,3 +1,6 @@
+from collections import Counter
+from datetime import datetime
+
 from src.app.domain.operations import Operation
 from src.app.domain.statistic import Statistic
 
@@ -11,6 +14,7 @@ def get_statistic(operations: list[Operation]) -> Statistic:
     statistic = Statistic(
         costs_sum=get_costs_sum(operations),
         categories_costs=get_categories_costs(operations),
+        costs_num_by_days=get_costs_num_by_days(operations),
     )
     return statistic
 
@@ -29,3 +33,12 @@ def get_categories_costs(operations: list[Operation]) -> dict[int, int]:
         )
         for mcc in operations_mcc
     }
+
+
+def get_costs_num_by_days(operations: list[Operation]) -> dict[str, int]:
+    costs_num_by_days = Counter()
+    for operation in operations:
+        costs_num_by_days[
+            datetime.fromtimestamp(operation.time).strftime("%Y-%m-%d")
+        ] += 1
+    return dict(costs_num_by_days)
diff --git a/src/schemas/statistic.py b/src/schemas/statistic.py
index 66434cc..ef52349 100644
--- a/src/schemas/statistic.py
+++ b/src/schemas/statistic.py
@@ -6,3 +6,4 @@ class StatisticSchema(BaseModel):
 
     costs_sum: int
     categories_costs: dict[int, int]
+    costs_num_by_days: dict[str, int]
diff --git a/tests/unit/statistic.py b/tests/unit/statistic.py
index 318bef6..5977be1 100644
--- a/tests/unit/statistic.py
+++ b/tests/unit/statistic.py
@@ -1,5 +1,6 @@
-import random
-from datetime import datetime
+from collections import Counter
+from datetime import datetime, timedelta
+from random import randint
 
 import pytest
 
@@ -12,9 +13,9 @@ async def test_get_statistic():
     # TODO: Переписати без рандомних операцій і перевірити результат
     operations = [
         Operation(
-            amount=random.randint(-10000, -10),
+            amount=randint(-10000, -10),
             description="description",
-            mcc=random.randint(9996, 9999),
+            mcc=randint(9996, 9999),
             source_type="manual",
             time=int(datetime.now().timestamp()),
             user_id=1,
@@ -32,3 +33,37 @@ async def test_get_statistic_with_empty_operations():
 
     assert statictic.costs_sum == 0
     assert statictic.categories_costs == {}
+
+
+@pytest.mark.asyncio
+async def test_statistic_by_days():
+    """
+    Статистика повинна містити в собі поле кількості операцій
+    на кожен день у наступному вигляді:
+
+        costs_num_by_days: dict[<date>: str, <num>: int]
+
+    В тесті створюються операції, записується їх кількість по дням
+    а потім йде перевірка на відповідність зі отриманою статистикою
+    """
+    operations_num_by_days = {}
+    operations = []
+    now = datetime.now()
+    date = datetime(now.year, now.month, now.day) - timedelta(days=6)
+    for _ in range(5):
+        date = date + timedelta(days=1)
+        opertations_num = randint(1, 10)
+        operations_num_by_days[date.strftime("%Y-%m-%d")] = opertations_num
+        operations += [
+            Operation(
+                amount=randint(-10000, -10),
+                description="description",
+                mcc=randint(9990, 9999),
+                source_type="manual",
+                time=int(date.timestamp() + randint(1, 8399)),  # random time of day
+                user_id=1,
+            )
+            for _ in range(opertations_num)
+        ]
+    statistic = get_statistic(operations)
+    assert statistic.costs_num_by_days == operations_num_by_days