Learn English – After taking a break from university, which word fills “I will [word here] university”, meaning that I’ll go back to university

The term that comes closest to what you're looking for is either trips or round trips.

A trip is a journey. A round trip is a journey that starts and ends in the same place. So if you start at home, travel to Paris, and then come back home, you have made a round trip to Paris.

In many cases, the "round" nature of a trip is implied. So the most common way of expressing what you're talking about would be:

You want to get a driving license? Oh, that's a pain. You'll have to make at least three trips.

The idea of multiple trips already, depending on context, carries some mild sense that the trips are a burden. If you use "round trips" instead, it emphasizes this:

You want to get a driving license? Oh, that's a pain. You'll have to make at least three round trips.

As best I can tell, this is the most idiomatic way to express what you're looking to express.

Abroad is the word you are looking for.

In or to a foreign country; away from your home.

It is widely used in expressions like:

I decided to study abroad for 2 years because it costs less money.

I enjoy living and working abroad because I meet new kinds of people every day!

I can't wait for my husband to return from his military operation abroad.

It also obviously works in both your example sentences, as per my previous examples (if you remove "in").

I've been living abroad for five years.

I hope my husband returns from abroad soon.

Update: Note that "abroad" is mostly used as an adverb, but can also be used as a noun, in expressions like "from abroad" as per my third example sentence and the OP's second example sentence.