Email alert upon queue failover during business hours

I couldn’t find a previous answer for this question, so I’m askin’ it.

Is there a way to have the asterisk server email me if a call goes into the failover of a queue during certain hours (7:30 am and 6:00 pm)?

I have a zabbix agent setup on this system–does anyone know if there is a way to have zabbix run a check for this? I couldn’t think of way–it seems to me that it would have to be an alteration of a dialplan–would it be possible to even alter that dialpan without it being overwritten by freepbx?