diff --git a/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/DurationAggregator.php b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/DurationAggregator.php
new file mode 100644
index 000000000..edf4dc24c
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Export/Aggregator/AccompanyingCourseAggregators/DurationAggregator.php
@@ -0,0 +1,99 @@
+<?php
+
+namespace Chill\PersonBundle\Export\Aggregator\AccompanyingCourseAggregators;
+
+use Chill\MainBundle\Export\AggregatorInterface;
+use Chill\PersonBundle\Export\Declarations;
+use Doctrine\ORM\QueryBuilder;
+use Symfony\Component\Form\FormBuilderInterface;
+
+/**
+ * Les regroupements seront un nombre de mois, arrondi à l'unité la plus proche (donc
+ * - au dela de 15 jours => 1 mois,
+ * - jusqu'à 45 jours => 1 mois,
+ *    15   |    45   |    75
+ *  --+----o----+----o----+----
+ *    |   30    |   60    |
+ * etc.)
+ */
+class DurationAggregator implements AggregatorInterface
+{
+
+    /**
+     * @inheritDoc
+     */
+    public function getLabels($key, array $values, $data)
+    {
+        return function ($value): string {
+            switch ($value) {
+
+                case '_header':
+                    return 'Duration';
+
+
+                default:
+                    throw new \LogicException(sprintf('The value %s is not valid', $value));
+            }
+        };
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function getQueryKeys($data): array
+    {
+        return ['duration_aggregator'];
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function buildForm(FormBuilderInterface $builder)
+    {
+        // no form
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function getTitle(): string
+    {
+        return 'Group by duration';
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function addRole()
+    {
+        return null;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function alterQuery(QueryBuilder $qb, $data)
+    {
+        $qb
+            ->addSelect('(acp.closingDate - acp.openingDate) AS duration_aggregator')
+        ;
+
+        $groupBy = $qb->getDQLPart('groupBy');
+
+        if (!empty($groupBy)) {
+            $qb->addGroupBy('duration_aggregator');
+        } else {
+            $qb->groupBy('duration_aggregator');
+        }
+
+        $qb->orderBy('duration_aggregator');
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function applyOn(): string
+    {
+        return Declarations::ACP_TYPE;
+    }
+}
\ No newline at end of file
diff --git a/src/Bundle/ChillPersonBundle/config/services/exports_accompanying_course.yaml b/src/Bundle/ChillPersonBundle/config/services/exports_accompanying_course.yaml
index 155ad11df..2b578b4f9 100644
--- a/src/Bundle/ChillPersonBundle/config/services/exports_accompanying_course.yaml
+++ b/src/Bundle/ChillPersonBundle/config/services/exports_accompanying_course.yaml
@@ -241,3 +241,10 @@ services:
         tags:
             - { name: chill.export_aggregator, alias: accompanyingcourse_referrer_aggregator }
 
+    chill.person.export.aggregator_duration:
+        class: Chill\PersonBundle\Export\Aggregator\AccompanyingCourseAggregators\DurationAggregator
+        autowire: true
+        autoconfigure: true
+        tags:
+            - { name: chill.export_aggregator, alias: accompanyingcourse_duration_aggregator }
+
diff --git a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
index 9bb2c7e3f..fdddd5c6c 100644
--- a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
+++ b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
@@ -569,6 +569,7 @@ Group by composition: Grouper les ménages par composition familiale
 Group by number of children: Grouper les ménages par nombre d'enfants
 
 ## persons aggregators
+Group by duration: Grouper par durée du parcours
 Group people by nationality: Grouper les personnes par nationalités
 Group by level: Grouper par niveau
 Group by continents: Grouper par continent