(04 Nov 2016, 5:37 pm)Dan wrote The frequency remains at every 7/8 minutes at peak times on weekdays - in my eyes, this would be the best frequency to promote.
It wouldn't be wrong to promote this frequency, if the words "up to" were included.
I suppose providing the 'up to' was there, which it is, it would perfectly fine to advertise the mentioned frequency. I was just thinking that it would be best to advertise the frequency that is operated under the most.