Wifi constantly cutting out

Today we've had our wifi crash now 3 times around 15-20 minutes apart. We've restarted it through the app and manually. We will on a semi-often basis have it crash sometime between 2-4 am cst but it's only temporary and usually comes back up on it's own with no restart needed which has happened since we started our service. But having it crash 3 times in one night is very annoying and unacceptable. I've checked multiple times but there are no outages listed near us so I don't know what could possibly be the problem. I don't know if the router is the problem or if it's the service itself.