Internal door hanging.

Lots of variables involved when hanging a door including state of existing lining, door type and weight, ease of accessibility and many other issues so it would be very difficult to say how many doors a carpenter would hang in a day , I have been known to hang up to twenty light weight doors in new linings in a day and conversely struggle to hang 1 nr heavy fire door in a twisted old lining in the same time.

This all depends on if the doors need cutting down and what type of doors they are. Also depends on how straight and square the frames are. Most joiners can fit 4-6 doors in a day depending on how much work needs doing on them.

Most decent carpenters should be able to hang 4-5 doors in a day with ironmongery fitted depending on what state the door lining is.

This all depends on what doors you are fitting. For example fire doors/solid doors take a lot longer to swing rather than the cheap paper doors . But if you have a good chippy they could be done in one day maybe having to come back for a few hours