diff --git a/Check.pm b/Check.pm
index 945e7fe..c9008fc 100644
--- a/Check.pm
+++ b/Check.pm
@@ -231,7 +231,7 @@ EOF
     my $DUlastTime     = timeStamp2($Info{DUlastValueTime});
     my $DUmaxTime      = timeStamp2($Info{DUDailyMaxTime});
     my $DUInodemaxTime = timeStamp2($Info{DUInodeDailyMaxTime});
-    my $frequence = timeStamp2($Info{FullPeriod});
+    my $frequence      = "???";
 
 # Show header
     $header = <<EOF;