i used to travel by TTC when i firstly came here and didn't get my driver license.
on TTC's schedule, there's always a FS during the peak hours.
in my understanding, FS (frequent service) should be more "frequent" than the scheduled ones, which is normally 10 minutes shift one after another, sometimes will be 30 minutes, but will mostly on time.
but soon I found that FS is really not that frequent, it's really very not reliable, sometimes I had to wait more than 30 minutes or longer, that made me very frustrated.
then I decided to definite the TTC's FS as
Fucking Service.