Jeremey is always right, but depending on the situation, you might want to leave it charging overnight. If you have done a deep discharge, then you will need to let the bms of the battery have more time to balance the pack. The charger will cylce on and off repeatedly, and might need all night to get it fully charged and balanced.
I commuted about 10,000 miles on ebikes, and pretty much the only time the battery was not on a charger was when my butt was on the bike. My commute required a pretty deep, 80% discharge twice a day, so my battery needed that longer charging to keep it balanced. The battery still lasted 3.5 years, so long enough to pay for itself three or four times over.
But in your case, lots of short cycles possible, your battery should remain balanced nicely, finish charging long before you go to bed, and then you should take the battery off the charger. Perhaps monthly, you could charge longer so as to be sure the bms has time to balance the pack.
Do use a voltmeter from time to time, or better still have one on the bike. The voltmeter will tell you right away if a charger or bms is not working right and the battery is overcharging. Or if it won't charge completely because it's out of balance, you'll see a few less volts than normal.
THE LIPO RULES. NEVER ABOVE 4.3V NEVER BELOW 2.7V DON'T PUNCTURE
Ideal charging /discharging range for Lipo, 3.65v minimum 4.1v maximum
See battery technology section, FAQ thread at the top of the page for lipo noob info.