I was perusing the Transport Canada Instrument Procedures Manual today and noticed a rather interesting exercise:

It’s called the VOR Time Check and allows you to estimate the amount of time required to cross a VOR while flying a radial.

Here is how you perform it:

Let’s say you’re flying the 022 degree radial towards the VOR. Select a radial that is divisible by 10, so the 030 radial in this case. (Trying to do this with the 020 radial, only being a 2 degree difference would be difficult).
Now fly to that radial …