The interface table and chart gadgets do not keep any historical data other than what is showed on the chart. There are a number of issues that arise when maintaining historical data and we leave that to Orion NPM. However, Toolset has a Network Performance Monitoring tool that might serve your need. Check out Classic Tools -> Network Monitoring -> Network Performance Monitor. Add your devices in and let it monitor. It has charts that will show your data in larger units. You just need to leave it up and running for as long as necessary to collect the window of data you are interested in as it will not save any data once closed.
Thanks for that very helpful insight, I will take a look at that part of the toolset.