Updates DQ dashboard page

Author: benironside

docs/serverless/dashboards/data-quality-dash.mdx

@@ -41,7 +41,7 @@ When you open the dashboard, data does not appear until you select indices to ch
 To customize which indices are checked when you click **Check all**, [change the current data view](((security-guide))/data-views-in-sec.html).
 </DocCallOut>
 
-* **Check a single index**: To check a single index, click the **Check index** button under **Actions**. Checking a single index is faster than checking all indices.
+* **Check a single index**: To check a single index, click the **Check now** button under **Actions**. Checking a single index is faster than checking all indices.
 
 ## Visualize checked indices
 The treemap that appears at the top of the dashboard shows the relative document count of your indices. The color of each index's node refers to its status:
@@ -63,6 +63,16 @@ The index check flyout provides more information about the status of fields in t
 Fields in the Same family category have the correct search behavior, but might have different storage or performance characteristics (for example, you can index strings to both text and keyword fields). To learn more, refer to [Field data types](((ref))/mapping-types.html).
 </DocCallOut>
 
+## View historical data quality results 
+
+You can review an index's data quality history by clicking **View history** under **Actions**. This opens the details flyout to the history tab. You can filter the results by time and **PASS** / **FAIL** status. Click a historical check to expand it and view more details.
+
+![An index's data quality history tab](../images/data-quality-dash/history-tab.png)
+
+<DocCallOut title="Note">
+Only the **Incompatible fields** view is available for historical data.
+</DocCallOut>
+
 ## Export data quality results
 
 You can share data quality results to help track your team's remediation efforts. First, follow the instructions under <DocLink slug="/serverless/security/data-quality-dash" section="check-indices">Check indices</DocLink> to generate results, then either:
@@ -75,7 +85,7 @@ You can share data quality results to help track your team's remediation efforts
 
 **Export results for one index**:
 
-1. View details for a checked index that has at least one incompatible field by clicking the **View check details** button under **Actions**.
+1. View details for a checked index that has at least one incompatible field by clicking the **Check now** button under **Actions**.
 1. From the **Incompatible fields** tab, select **Add to new case** to open a new <DocLink slug="/serverless/security/cases-overview">case</DocLink>, or click **Copy to clipboard** to copy a Markdown report to your clipboard.
 
 <DocCallOut title="Note">