This is why, as an English teacher, I like to just give a ballpark for length, and just say it should be as long as it needs to be to get the point across successfully. If you answer the prompt in full, it should be plenty long enough.
Why not just say almost 4 years?
Anecdotal evidence here, if I use antiperspirants for any extended amount of time, I begin to sweat from my armpits uncontrollably, as in sweat literally pours out of my armpits like a leaky faucet, and that’s not an exaggeration. I now use straight deodorant exclusively and just deal with normal sweat amounts.
Everyone know the the real method is to grab it between your pointer and middle knuckles like you’re knocking an arrow. Then give it a good yank, and if you do it to someone else, yell, “got your nose!”, as loud as you can.