Colloquialisms:

1. Shorter time, faster time
2. Longer time, slower time
3. Accelerate motion
4. Slow down motion

Reality:

1. Shorter, faster
2. Longer, slower
3. Increase velocity
4. Decrease velocity

You cannot accelerate time of something - you can increase velocity of something
You cannot accelerate motion of something - you can increase velocity of something
You cannot slow down time of something - you can decrease velocity of something
You cannot slow down motion of something - you can decrease velocity of something
You cannot stop time of something - you can stop something
You cannot stop motion of something - you can stop something

because time (motion) doesn't belong to physical entities.