I would like to ask for help: I am organizing a meeting for X people on a weekly basis. Now, there are some less involved stakeholders that should be invited only once a month. It occurred to me that I am not sure how to say:
"Some will be invited on a lesser/lower frequency/basis" is certainly wrong but I cannot think of anything better. I am not looking for another means to express that, I would like to find out what would be the proper adjective and noun to use in a sentence like this one.