I don't see any 22mins leh. 
Whichever the
case, as I have been relying on 156 for >6 years, I can
affirmatively agree that the frequency is really atrocious. I guess
the heavy loading ultimately stems from the unearthly frequencies.
The bus can be fully packed anytime in the afternoon, from
dismissal times, right up to the evenings. Right now, I am
compiling all the trips with bursting loads and shall reflect to
SBST in due time.
I must have remembered wrongly. Yea. Frequency is atrocious. But
the bus I always take is empty. I take towards Clementi in the
afternoon.
On a side not, the timetable has been revised again. But from
the frequency is still 20mins for 8 trips during PM peak.
Another thing, if you want to experience a very fast ride on a
KUB, take the 6.42am bus leaving the last stop of Sixth Ave on a
weekday morning towards Sengkang. That driver is quite mad. He used
to drive 582M. He really floors the accelerator.
