Don't buy technology from walmart. I worked in manufacturing..people think its all the same but different customers get different levels of quality.

What if....
You froze time for a few seconds...a few hours...a hundred years...
would you age while time was frozen? How would you know how long time was frozen?

It comes back to perception again... to those that were frozen you would have aged a hundred years instantly but to you and say your friend who bravely volunteered for this mission with you, you would have aged in normal time.

I think what you are saying about time is like the train explanation of Einsteins theory of relativity.
If you are on a train going at a certain speed and the train next to you is going the exact same speed, then when you observe a passenger in the other train they do not appear to be moving. But if you are standing on the platform observing that same passenger they are moving.
So since we can't stand on the platform of time we can't observe if it is fluctuating.