"Regular churchgoers" refers to people who attend religious services or worship at a church on a consistent basis, rather than sporadically. Full definition
Regular churchgoers of the christan faith. (fsat.ru)
The finding that regular churchgoers seem to be happier than people who are not religious (9 October, p 14) could... (newscientist.com)
Most church leaders, however, do not agree that scripture and creed are collectively scripted texts that offer a «manufactured reality» (to use Daniel Boorstin's phrase), nor are most regular churchgoers prepared to engage such a notion. (religion-online.org)