"Day minimum" refers to the minimum amount of time or work required for a specific day. It means that there is a certain minimum expectation or requirement that needs to be fulfilled for that day. Full definition
There is a 3 night / 4 day minimum stay for this home which may vary during holidays and special events. (vacationpalmsprings.com)
With dogs, typically it's three visits per day minimum for those unable to go outside to potty without a human opening doors and such. (barbaraspetcareservices.com)
The standard advertising budget recommendation is $ 5 - $ 10 per day minimum for a month before you can expect to see a return. (theabundantartist.com)