Suggestion: pick up a copy of PingPlotter, enter in googleapis.com, set it for 5 or 10 second resolution, then run it. You get 14 days on the Standard/Pro edition to collect unlimited samples, and can switch to the free edition after that. See what kind of reliability you get over 24/48 hours, and what kind of pings you get on each hop. It might indicate any problems along the route, or if your connection drops out entirely. Attached a sample plot on my VPN connection to this post so you can see the kind of info you get from it.
You can always just run a ping test from a command prompt, but lose detail on each hop that way.
I used this method when proving to my ISP that there were connection issues. It helped me to successfully get the FCC involved and force the ISP to fix their hardware.
Edit: I left mine running a little while after making this post, and the IP resolution changed on-the-fly. That's DNS and/or Google doing it, not me. Really nice info you can get on packets and hops this way.