noun, noun or participle which takes 'suru', intransitive verb
in and out; coming and going; traffic
General noun for movement of people or things in and out of a place. Also used figuratively for money (income and expenses) and for unrestricted access (run of the house). The 'free associations' gloss refers to social comings and goings.
この部屋は人の出入りが激しい。
There is a lot of coming and going in this room.
彼
He has the run of the house.