I do not see honey flow is an incorrect term to use. Nectar does not flow (I am sure there are exceptions) it is replenished usually nightly. If somebody like I me goes to a Eucalyptus blossom and licks out the nectar there is no flow to replenish it. The nectar is replenished usually on a schedule. On the other hand when flowering is prolific the bees create a honey flow, from the nectar and this lovely stuff is stashed away in frames.
Well that’s my take and I’m sticking by honey flow.