I have a residence permit of Germany. I want to work in another country but maintain my residence in Germany. Is it possible that I visit Germany twice a year to maintain my permit? Visiting Germany every 179 days makes the Residence Permit invalid? Or it must be that I stay in Germany for a total of 180 days in a year to maintain my residence permit(limited: Aufenthaltstitel, purpose: study)?
For example I stay out of Germany (as well as EU) for 170 days. Stay in Germany for the next 20 days then again out for 170 days and then come back. In this case the Permit gets invalid or not?