diff --git a/src/main/java/org/apache/commons/lang3/time/DurationUtils.java b/src/main/java/org/apache/commons/lang3/time/DurationUtils.java
index 5bf2ebbae..afb3804a5 100644
--- a/src/main/java/org/apache/commons/lang3/time/DurationUtils.java
+++ b/src/main/java/org/apache/commons/lang3/time/DurationUtils.java
@@ -56,7 +56,7 @@ public class DurationUtils {
     public static <T extends Throwable> void accept(final FailableBiConsumer<Long, Integer, T> consumer, final Duration duration)
             throws T {
         if (consumer != null && duration != null) {
-            consumer.accept(duration.toMillis(), getNanosOfMiili(duration));
+            consumer.accept(duration.toMillis(), getNanosOfMilli(duration));
         }
     }
 
@@ -72,8 +72,28 @@ public class DurationUtils {
      *
      * @param duration The duration to query.
      * @return nanoseconds between 0 and 999,999.
+     * @deprecated Use {@link #getNanosOfMilli(Duration)}.
      */
+    @Deprecated
     public static int getNanosOfMiili(final Duration duration) {
+        return getNanosOfMilli(duration);
+    }
+
+    /**
+     * Gets the nanosecond part of a Duration converted to milliseconds.
+     * <p>
+     * Handy when calling an API that takes a long of milliseconds and an int of nanoseconds. For example,
+     * {@link Object#wait(long, int)} and {@link Thread#sleep(long, int)}.
+     * </p>
+     * <p>
+     * Note that is this different from {@link Duration#getNano()} because a duration are seconds and nanoseconds.
+     * </p>
+     *
+     * @param duration The duration to query.
+     * @return nanoseconds between 0 and 999,999.
+     * @since 3.13.0
+     */
+    public static int getNanosOfMilli(final Duration duration) {
         return zeroIfNull(duration).getNano() % 1_000_000;
     }
 
diff --git a/src/test/java/org/apache/commons/lang3/time/DurationUtilsTest.java b/src/test/java/org/apache/commons/lang3/time/DurationUtilsTest.java
index 89023e9b6..d3d8f3126 100644
--- a/src/test/java/org/apache/commons/lang3/time/DurationUtilsTest.java
+++ b/src/test/java/org/apache/commons/lang3/time/DurationUtilsTest.java
@@ -38,6 +38,20 @@ public class DurationUtilsTest extends AbstractLangTest {
 
     @Test
     public void testGetNanosOfMilli() {
+        assertEquals(0, DurationUtils.getNanosOfMilli(null));
+        assertEquals(0, DurationUtils.getNanosOfMilli(Duration.ZERO));
+        assertEquals(1, DurationUtils.getNanosOfMilli(Duration.ofNanos(1)));
+        assertEquals(10, DurationUtils.getNanosOfMilli(Duration.ofNanos(10)));
+        assertEquals(100, DurationUtils.getNanosOfMilli(Duration.ofNanos(100)));
+        assertEquals(1_000, DurationUtils.getNanosOfMilli(Duration.ofNanos(1_000)));
+        assertEquals(10_000, DurationUtils.getNanosOfMilli(Duration.ofNanos(10_000)));
+        assertEquals(100_000, DurationUtils.getNanosOfMilli(Duration.ofNanos(100_000)));
+        assertEquals(0, DurationUtils.getNanosOfMilli(Duration.ofNanos(1_000_000)));
+        assertEquals(1, DurationUtils.getNanosOfMilli(Duration.ofNanos(1_000_001)));
+    }
+
+    @Test
+    public void testGetNanosOfMiili() {
         assertEquals(0, DurationUtils.getNanosOfMiili(null));
         assertEquals(0, DurationUtils.getNanosOfMiili(Duration.ZERO));
         assertEquals(1, DurationUtils.getNanosOfMiili(Duration.ofNanos(1)));