diff --git a/classes/class_combat.lua b/classes/class_combat.lua
index bf82f214..3b1ceae4 100644
--- a/classes/class_combat.lua
+++ b/classes/class_combat.lua
@@ -91,9 +91,24 @@
 		end
 	end
 
-	--return data for charts
+	---return a table representing a chart data
+	---@param name string
+	---@return number[]
 	function classCombat:GetTimeData(name)
-		return self.TimeData[name]
+		if (self.TimeData) then
+			return self.TimeData[name]
+		end
+		return {max_value = 0}
+	end
+
+	---erase a time data if exists
+	---@param name string
+	function classCombat:EraseTimeData(name)
+		if (self.TimeData[name]) then
+			self.TimeData[name] = nil
+			return true
+		end
+		return false
 	end
 
 	function classCombat:GetContainer(attribute)
diff --git a/functions/timedata.lua b/functions/timedata.lua
index 14fc99f1..bd211670 100644
--- a/functions/timedata.lua
+++ b/functions/timedata.lua
@@ -229,6 +229,7 @@
 		tickTime = 0
 
 		--return the capture table the to combat object
+		--the return value goes into combatObject.TimeData = @chartTables
 		return chartTables
 	end