adding quarterlyOn cron schedule frequency command (#42692)

* adding quarterlyOn cron schedule frequency command

* Update ManagesFrequencies.php

Co-authored-by: Matyas Groger <matyas.groger@peoplefone.com>
Co-authored-by: Taylor Otwell <taylor@laravel.com>

src/Illuminate/Console/Scheduling/ManagesFrequencies.php

@@ -467,6 +467,21 @@ public function quarterly()
                     ->spliceIntoPosition(4, '1-12/3');
     }
 
+    /**
+     * Schedule the event to run quarterly on a given day and time.
+     *
+     * @param  int  $dayOfQuarter
+     * @param  int  $time
+     * @return $this
+     */
+    public function quarterlyOn($dayOfQuarter = 1, $time = '0:0')
+    {
+        $this->dailyAt($time);
+
+        return $this->spliceIntoPosition(3, $dayOfQuarter)
+                    ->spliceIntoPosition(4, '1-12/3');
+    }
+
     /**
      * Schedule the event to run yearly.
      *