Buses run seven days of the week, although services are less frequent on Sundays.

The calls were less frequent now, normally once a week on Sunday afternoons.

Services are less frequent in the evenings and on Sundays.

Trains were so frequent on this line that there was no need to aim for a particular one.

Posts are frequent - on the order of ten every day.

Moderation can be less frequent in the evening and on weekends.

Services are less frequent in the late evenings and on Sundays, usually every 60 minutes.

Train service is very frequent on the line as this line goes to Chicago.

I am told that this kind of incident is becoming far too frequent on the roads around the capital.

And such things were frequent enough on this dying planet.