A radioactive drug is then injected weekly every four to six weeks to attack the tumour.

I kean its not really specified so I tried to give as much context as possible.

Thx for the diagnosis btw

nah I think your reading comprehension is off, it’s a week of treatment, then several weeks off. As a non-native English speaker I get why the original phrasing of “weekly” wasn’t the clearest way of putting it, but I think the guy you called schizo just didn’t understand what you were confused by