intercalatedly

Adding something in the middle of, or somewhere between, other things. To insert, place, or position something or someone between or among existing elements or layers.

Merriam-Webster's Dictionary defines INTERCALATED as: To insert, place, or position something or someone between or among existing elements or layers.
INTERCALATEDLY is an adjective. It specifies how something is inserted, such as at the beginning, or on top, or at the end, or in the middle. For example, if you have 10 women standing in a stage, you INTERCALATE one man between each woman. That results in 20 people standing in an arrangement where there is one man between each woman, and vice versa.