Backup on Shutdown 3x week?

I'd like to perform my backups 3 times a week at shutdown. I see you can backup on shutdown either everytime the computer shuts down, or once a day at shutdown. Any way I can get it to backup 3 times a week?

 

Hello agbates,

Thank you for your interest in Acronis True Image (http://www.acronis.com/homecomputing/products/trueimage/).

We regret to inform that if you choose the task "When my computer shuts down", the program can only perform this task every time your computer shuts down or perform it once a day on a shut down.

You can make backups 3 times a week if you choose "weekly". Then you can select the days of the week you want to make backups and the time you want the task to start.

Thank you.
--
Irina Shirokova