from my experience :
She is a bitch who will hard camp the door, so just play along and be efficient.
My method : wait until she's in the camera next to the door (from where she will attack you); and close the door.
The next laugh mean she got back so open the door (CHECKS CHICA FIRST), and wait until next laugh to close the door.
Personally I won by checking the two camera next yo the office because they are forced to come there before entering the office (even foxy), and accepting to let Freddina dominate me (so close doors when she's there).