Yes, I totally understand you are seeking a solution. But we would love to see some sincere effort from your part for this pretty much straightforward problem and then if you are stuck at some point let us know we will be more than happy to guide you. Please note that this forum is not a script development service.
BTW you can schedule your script in job scheduler: crontab
I have already script scheduled for taking daily backups that send notification through CRON i want that it also show the mountpoint space after backup completes.