Tesla Motors Club

I just got back from an 800 mile trip in my Volt, using mostly gas, and I've been trying to estimate where I will stop to charge on that same trip in a Model 3. I've been trying to find a simple answer to my question and I have yet to find it. In simple terms, as volts, amps, and watts do not compute in my head, what is the speed difference between destination chargers and superchargers? For instance, I can find one estimate that a Model S at a supercharger will get 170 miles per half hour of charging. My Volt, in comparison, charges at home on a 120 volt line at the rate of 4 miles per hour of charging. THAT'S the info I want, not how many amps/volts, or whatnots get charged into the battery. Where I'll be driving has very few superchargers, but many more destination chargers.

Can anybody give me a rough estimate of the charging speed difference, in terms of the time it might take to charge? I know superchargers are faster, but how much?