Mathematical language isn't very well understood by many people. People may possibly mistakenly use "month-to-month average" when they really want the 'average per 30 days' but that doesn't change the meaning of those terms, just as people producing about "stationery autos" does not change the meaning of "stationery" or https://financefeeds.com/weekly-roundup-what-prop-traders-are-really-doing-itrade-loses-license/