diff --git a/config/schema/facets.processor.schema.yml b/config/schema/facets.processor.schema.yml
index ebdd249..b380515 100644
--- a/config/schema/facets.processor.schema.yml
+++ b/config/schema/facets.processor.schema.yml
@@ -112,3 +112,11 @@ plugin.plugin_configuration.facets_processor.date_item:
     date_format:
       type: string
       label: 'Date format'
+
+plugin.plugin_configuration.facets_processor.granularity_item:
+  type: mapping
+  label: 'Granular item processor'
+  mapping:
+    granularity:
+      type: integer
+      label: 'Granularity'