1) How to add space between every word when typing into Word?
2) There is a marked line between each person in this row.
I believe usages of 'between each/every' in the contexts above are nothing out of the ordinary. But the logic behind it has always struck me as odd. 'Between', by definition, should logically be followed by a binary phrase (involving two entities). Yet, there doesn't seem to be a clearer way to express those two example sentences without shifting the focus: I could say 'between every two persons' in the second example but that would clearly lead to some confusion.
So is this just a case of idiomatic dictation, or are there better ways to phrase these example sentences? Many thanks in advance.