Things that takes 3 years:
It takes an average of two years, 11 months and eight days to go from meeting someone special to getting engaged.
Most UK undergraduate degrees take less than three years to complete.
Once in a blue moon’ may refer to a rare event, but you can experience a blue moon roughly once every three years.
If you can get your hands on a spacecraft, travelling to Mars only takes around six months. However, Earth and Mars are only close together roughly every two years, so you’d have to wait before coming home again.
If you walk with a speed of 5 km/h 8 hrs a day it takes about 3 years to walk around the world.
It takes 4 years for the speed of light to travel to our nearest star, Alfa Ceantauri. So if WT manage to release TextBlade this year they can in a sence say they are working faster than the speed of light...
Can you come up with other things that takes about 3 years?