diff --git a/chrome/browser/ui/android/pdf/java/src/org/chromium/chrome/browser/pdf/PdfCoordinator.java b/chrome/browser/ui/android/pdf/java/src/org/chromium/chrome/browser/pdf/PdfCoordinator.java
index 4296f0a5f29f9350c598fb539ade67fc20bc4c77..6f303f9bb023bcae10cb9a4eb9a3a10b941327d5 100644
--- a/chrome/browser/ui/android/pdf/java/src/org/chromium/chrome/browser/pdf/PdfCoordinator.java
+++ b/chrome/browser/ui/android/pdf/java/src/org/chromium/chrome/browser/pdf/PdfCoordinator.java
@@ -93,12 +93,20 @@ public class PdfCoordinator {
         @Override
         public void onLoadDocumentSuccess() {
             mIsLoadDocumentSuccess = true;
-            PdfUtils.recordPdfLoadTime(SystemClock.elapsedRealtime() - mDocumentLoadStartTimestamp);
+            long duration = SystemClock.elapsedRealtime() - mDocumentLoadStartTimestamp;
+            if (mDocumentLoadStartTimestamp > 0) {
+                PdfUtils.recordPdfLoadTimePaired(duration);
+                PdfUtils.recordPdfLoadResultPaired(true);
+            }
+            PdfUtils.recordPdfLoadTime(duration);
             PdfUtils.recordPdfLoadResult(true);
         }
 
         @Override
         public void onLoadDocumentError(@NonNull Throwable throwable) {
+            if (mDocumentLoadStartTimestamp > 0) {
+                PdfUtils.recordPdfLoadResultPaired(false);
+            }
             PdfUtils.recordPdfLoadResult(false);
         }
     }
diff --git a/chrome/browser/ui/android/pdf/java/src/org/chromium/chrome/browser/pdf/PdfUtils.java b/chrome/browser/ui/android/pdf/java/src/org/chromium/chrome/browser/pdf/PdfUtils.java
index 4ec91f2c8f07665628f367b22ccdd98da6b3d318..55b6af60e51f2580480085c87fbb214f8a05763b 100644
--- a/chrome/browser/ui/android/pdf/java/src/org/chromium/chrome/browser/pdf/PdfUtils.java
+++ b/chrome/browser/ui/android/pdf/java/src/org/chromium/chrome/browser/pdf/PdfUtils.java
@@ -294,10 +294,19 @@ public class PdfUtils {
         RecordHistogram.recordBooleanHistogram("Android.Pdf.DocumentLoadResult", isLoadSuccess);
     }
 
+    static void recordPdfLoadResultPaired(boolean isLoadSuccess) {
+        RecordHistogram.recordBooleanHistogram(
+                "Android.Pdf.DocumentLoadResult.Paired", isLoadSuccess);
+    }
+
     static void recordPdfLoadTime(long duration) {
         RecordHistogram.recordTimesHistogram("Android.Pdf.DocumentLoadTime", duration);
     }
 
+    static void recordPdfLoadTimePaired(long duration) {
+        RecordHistogram.recordTimesHistogram("Android.Pdf.DocumentLoadTime.Paired", duration);
+    }
+
     static void recordFindInPage(int findInPageCounts) {
         RecordHistogram.recordExactLinearHistogram(
                 "Android.Pdf.FindInPageCounts", findInPageCounts, /* max= */ 9);
diff --git a/tools/metrics/histograms/metadata/android/histograms.xml b/tools/metrics/histograms/metadata/android/histograms.xml
index 51910a364f6959905894dd049d57e770232077f4..9bfe427fcde650b8f21dfd0089cf84653b8f208c 100644
--- a/tools/metrics/histograms/metadata/android/histograms.xml
+++ b/tools/metrics/histograms/metadata/android/histograms.xml
@@ -3642,7 +3642,20 @@ chromium-metrics-reviews@google.com.
   <owner>clank-large-form-factors@google.com</owner>
   <summary>
     Records the pdf document load results. True means success and false means
-    failure. Recorded when the pdf load is complete.
+    failure. Recorded when the pdf load is complete. May be recorded when there
+    is no paired Android.Pdf.DocumentLoad, e.g. the pdf document is restored by
+    OS.
+  </summary>
+</histogram>
+
+<histogram name="Android.Pdf.DocumentLoadResult.Paired" enum="Boolean"
+    expires_after="2025-03-02">
+  <owner>shuyng@google.com</owner>
+  <owner>clank-large-form-factors@google.com</owner>
+  <summary>
+    Records the pdf document load results. True means success and false means
+    failure. Recorded when the pdf load is complete. Only record when there is a
+    paired Android.Pdf.DocumentLoad.
   </summary>
 </histogram>
 
@@ -3652,7 +3665,19 @@ chromium-metrics-reviews@google.com.
   <owner>clank-large-form-factors@google.com</owner>
   <summary>
     Records the pdf document load time. Recorded when the pdf load is complete.
-    Records successful pdf loads only.
+    Records successful pdf loads only. May be recorded when there is no paired
+    Android.Pdf.DocumentLoad, e.g. the pdf document is restored by OS.
+  </summary>
+</histogram>
+
+<histogram name="Android.Pdf.DocumentLoadTime.Paired" units="ms"
+    expires_after="2025-03-02">
+  <owner>shuyng@google.com</owner>
+  <owner>clank-large-form-factors@google.com</owner>
+  <summary>
+    Records the pdf document load time. Recorded when the pdf load is complete.
+    Records successful pdf loads only. Only record when there is a paired
+    Android.Pdf.DocumentLoad.
   </summary>
 </histogram>