Mathematical language is not nicely understood by many people. People may perhaps mistakenly use "regular monthly average" when they actually want the 'average a month' but that doesn't change the meaning of those conditions, just as people producing about "stationery automobiles" does not change the meaning of "stationery" or https://financefeeds.com/finra-fines-velox-clearing-1-3-million-over-aml-supervision-and-communication-failures/