Do I need to remind you that you are the one who, while admitting that 5e combat is way quicker, absolutely wanted to argue that minions only combat is quicker with 4e, as if it was an argument for that way of managing minions ? Hence the very relevancy of the question of the frequency, because that advantage remains totally theoretical and non applicable for the huge majority of the fights.
See above, this "quickness" is irrelevant, since it's for almost non-existent cases (and in any case you admit that 5e combat is significantly quicker).
As for the "movie-type" I'm still waiting for a demonstration. There are many cases where the "minions" of the genre take more than one hit to go down, and actually go back up.
They don't, although, once more, I'll give you the 4e definition: "Minions are designed to serve as shock troops and cannon fodder for other monsters (standard, elite, or solo) [...] Use minions as melee combatants placed between the PCs and back-rank artillery or controller monsters.", which implies the actual presence of other monsters in at least a vast majority of the cases.
Since combat, which might or might not include "minion-types" is way faster in 5e than 4e, it clearly shows that the theoretical advantage of not counting hit points is a very marginal effect, which is absolutely confirmed by my personal experience through 40+ years of roleplaying all editions of D&D.