How long can I stay out of uk on a spouse visa 5 year route

[yoonssoe]

Hi Advisors!

I just had my first period (2 and a half from total 5 years route) of spouse visa FLR(M) on last November 2016.
Due to my husband wants to further study about my country's languages, we are planning to go to my country for around 4-6 months (if possible). Could you please advise me how long can I stay out side of UK before I apply for my second FLR(M) on April 2019?

Please give me some help! Thanks in advance!

[CR001]

Absences should be limited and for good reason. Absence of 180 days or more must be declared for ILR. Absence of 180 days or more breaks continuity in residence.