It needs a bit more detail. Is the assumption of groceries once a week really weak? (literally everybody I know gets groceries once a week) Is the density of d

It needs a bit more detail. Is the assumption of groceries once a week really weak? (literally everybody I know gets groceries once a week) Is the density of drivers and customers such that drivers deliver at a rate <<15 min? "Not everybody gets 50+ deliveries a year" can sound as sensible as "Not everybody brushes their teeth every day" or as pedantic as "Not everybody sleeps every day" depending on the underlying statistics.