Fall by and Roll in

Roll in and fall by are semantically related in advance topic. In some cases you can use "Roll in" instead a verb "Fall by", when it comes to topics like come to a destination.

Roll in verb - Pour or flow in a steady stream.

Fall by and roll in are semantically related in advance topic. Sometimes you can use "Fall by" instead a verb "Roll in", if it concerns topics such as come to a destination.