diff --git a/custom_components/irrigation_unlimited/const.py b/custom_components/irrigation_unlimited/const.py
index 2d23d46..d9f2099 100644
--- a/custom_components/irrigation_unlimited/const.py
+++ b/custom_components/irrigation_unlimited/const.py
@@ -122,6 +122,7 @@
 CONF_USER = "user"
 CONF_TOGGLE = "toggle"
 CONF_EXTENDED_CONFIG = "extended_config"
+CONF_READ_DELAY = "read_delay"
 
 # Defaults
 DEFAULT_NAME = DOMAIN
diff --git a/custom_components/irrigation_unlimited/history.py b/custom_components/irrigation_unlimited/history.py
index 5546158..0ab5f15 100644
--- a/custom_components/irrigation_unlimited/history.py
+++ b/custom_components/irrigation_unlimited/history.py
@@ -25,6 +25,7 @@
     CONF_HISTORY,
     CONF_HISTORY_REFRESH,
     CONF_HISTORY_SPAN,
+    CONF_READ_DELAY,
     CONF_REFRESH_INTERVAL,
     CONF_SPAN,
     TIMELINE_ADJUSTMENT,
@@ -69,6 +70,7 @@ def __init__(self, hass: HomeAssistant, callback: Callable[[set[str]], None]):
         self._history_span = timedelta(days=7)
         self._refresh_interval = timedelta(seconds=120)
         self._enabled = True
+        self._read_delay = timedelta(0)
         # Private variables
         self._history_last: datetime = None
         self._cache: dict[str, Any] = {}
@@ -89,8 +91,8 @@ def _remove_refresh(self) -> None:
 
     def _get_next_refresh_event(self, utc_time: datetime, force: bool) -> datetime:
         """Calculate the next event time."""
-        if self._history_last is None or force or not self._fixed_clock:
-            return utc_time
+        if self._history_last is None or force:
+            return utc_time + self._read_delay
         return utc_time + self._refresh_interval
 
     def _schedule_refresh(self, force: bool) -> None:
@@ -107,8 +109,7 @@ async def _async_handle_refresh_event(self, utc_time: datetime) -> None:
         """Handle history event."""
         # pylint: disable=unused-argument
         self._refresh_remove = None
-        if self._fixed_clock:
-            self._schedule_refresh(False)
+        self._schedule_refresh(False)  # Perpetual worker
         await self._async_update_history(self._stime)
 
     def _initialise(self) -> bool:
@@ -252,6 +253,8 @@ def load(self, config: OrderedDict, fixed_clock: bool) -> "IUHistory":
             self._enabled = hist_conf.get(CONF_ENABLED, self._enabled)
             span_days = hist_conf.get(CONF_SPAN, span_days)
             refresh_seconds = hist_conf.get(CONF_REFRESH_INTERVAL, refresh_seconds)
+            if (read_delay := hist_conf.get(CONF_READ_DELAY)) is not None:
+                self._read_delay = timedelta(seconds=read_delay)
 
         if span_days is not None:
             self._history_span = timedelta(days=span_days)
diff --git a/custom_components/irrigation_unlimited/schema.py b/custom_components/irrigation_unlimited/schema.py
index 899430b..cdf3205 100644
--- a/custom_components/irrigation_unlimited/schema.py
+++ b/custom_components/irrigation_unlimited/schema.py
@@ -92,6 +92,7 @@
     CONF_USER,
     CONF_TOGGLE,
     CONF_EXTENDED_CONFIG,
+    CONF_READ_DELAY,
 )
 
 IU_ID = r"^[a-z0-9]+(_[a-z0-9]+)*$"
@@ -315,6 +316,7 @@ def _parse_dd_mmm(value: str) -> date | None:
         vol.Optional(CONF_ENABLED): cv.boolean,
         vol.Optional(CONF_REFRESH_INTERVAL): cv.positive_int,
         vol.Optional(CONF_SPAN): cv.positive_int,
+        vol.Optional(CONF_READ_DELAY): cv.positive_int,
     }
 )