Merge pull request #205852 from AaronMaxwell/aaronmax-clarify-count

Clarifying valueCount and itemCount have a min value of 1

Author: PRMerger18

articles/azure-monitor/app/api-custom-events-metrics.md

@@ -150,6 +150,9 @@ The telemetry is available in the `customEvents` table on the [Application Insig
 
 If [sampling](./sampling.md) is in operation, the `itemCount` property shows a value greater than `1`. For example, `itemCount==10` means that of 10 calls to `trackEvent()`, the sampling process transmitted only one of them. To get a correct count of custom events, use code such as `customEvents | summarize sum(itemCount)`.
 
+> [!NOTE]
+> itemCount has a minimum value of one; the record itself represents an entry.
+
 ## GetMetric
 
 To learn how to effectively use the `GetMetric()` call to capture locally pre-aggregated metrics for .NET and .NET Core applications, see [Custom metric collection in .NET and .NET Core](./get-metric.md).
@@ -212,6 +215,9 @@ The telemetry is available in the `customMetrics` table in [Application Insights
 * `valueSum`: The sum of the measurements. To get the mean value, divide by `valueCount`.
 * `valueCount`: The number of measurements that were aggregated into this `trackMetric(..)` call.
 
+> [!NOTE]
+> valueCount has a minimum value of one; the record itself represents an entry.
+
 ## Page views
 
 In a device or webpage app, page view telemetry is sent by default when each screen or page is loaded. But you can change the default to track page views at more or different times. For example, in an app that displays tabs or blades, you might want to track a page whenever the user opens a new blade.