[serverless] Updates DQ dashboard page

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:
@@ -53,7 +53,7 @@ The treemap that appears at the top of the dashboard shows the relative document
 Click a node in the treemap to expand the corresponding index.
 
 ## Learn more about checked index fields
-After an index is checked, `Pass` or `Fail` appears in its **Result** column. `Fail` indicates mapping problems in an index. To view index check details, including which fields weren't successfully mapped, click the **View check details** button under **Actions**.
+After an index is checked, a `Pass` or `Fail` status appears. `Fail` indicates mapping problems in an index. To view index check details, including which fields weren't successfully mapped, click the **Check now** button under **Actions**.
 
 ![An expanded index with some failed results in the Data Quality dashboard](../images/data-quality-dash/-dashboards-data-qual-dash-detail.png)
 
@@ -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**, or by clicking the **History** tab in the details flyout. 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">
+Recent historical data includes the **Incompatible fields** and **Same family** views. Legacy historical data only includes the **Incompatible fields** view.
+</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 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">