Use UnitOfFrequency in integrations (#83915)

homeassistant/components/powerwall/sensor.py

@@ -16,9 +16,9 @@ from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
     ELECTRIC_POTENTIAL_VOLT,
     ENERGY_KILO_WATT_HOUR,
-    FREQUENCY_HERTZ,
     PERCENTAGE,
     UnitOfElectricCurrent,
+    UnitOfFrequency,
     UnitOfPower,
 )
 from homeassistant.core import HomeAssistant
@@ -80,7 +80,7 @@ POWERWALL_INSTANT_SENSORS = (
         name="Frequency Now",
         state_class=SensorStateClass.MEASUREMENT,
         device_class=SensorDeviceClass.FREQUENCY,
-        native_unit_of_measurement=FREQUENCY_HERTZ,
+        native_unit_of_measurement=UnitOfFrequency.HERTZ,
         entity_registry_enabled_default=False,
         value_fn=_get_meter_frequency,
     ),