Everyday Grammar: Expressions With "Other"

We would write to each other every month.
Or you could say that you wrote to one another every month.
The meaning in this case is the same.
But most often each other is used to talk about two people.
While one another refers to more than two people.

We mentioned EACH OTHER and ONE ANOTHER, but there is also EVERY OTHER!
I got to class every other day.
EVERY OTHER talks about an “alternate.”
means that one goes to class one day, not the next day, but then again on the third day.
How about THE OTHER ?
The other day, THE OTHER morning, THE OTHER week ?
“I saw George the other day.”