Thanks ILRdep. The link was informative, however there is more confusion after going through it and I have quoted this in my second question to my query.

Thanks once again.

Thanks Feigoronin for your response. The reason I didnt apply for my wife together with mine was due to the following reason which I missed to mention in my previous post. When first entered in UK I was on a Work Permit and wife was a dependant of WP. That is from 11 Sept 2006 till 21st October 2008...

Hi Board, I got the ILR on 19th December 2012 and we are planning to apply for my Wife and Son by end of this month. I have a concern about my Wifes absense days from UK. Both me and my wife first entered in UK on 11 Sept 2006, since 2008 we have mostly taken 30days holiday during which we spend out...