Radiation: 20 Days Straight Or Once A Week For 5 Weeks?

I got coming up in January SBRT (Stereotactic Body Radiation Therapy) and am trying to figure out if I should do 20 consecutive days of it at low doses per day or take it once a week for 5 weeks at higher weekly doses?

A burning question I forgot to ask the radiation oncologist was whether or not a single weekly dose would be a figure that's 5 x the daily dose?

The other is: Which is likely to be safer, less demanding on the body, and have less side effects?