I'm not certain if I'm providing you with what you are asking for so I shall conclude Presbyterianism with this one last item. The Presbyterian Church, if I recall correctly observes what they call the communion once a year. However, Levitricus 24:5-9 shows that the shewbread which was to be changed and eaten weekly by the Levitical priests was a shadow, Heb. 10:1 of the new which is the Lord's supper. The disciples after the establishment of the church continued "steadfastly" in the breaking of bread, Acts 2:42. The church in the NT communed weekly, cts 20:7. How often does the first day of the week come? Once a week, of course.