There is only one Tuesday in each week in 2011. What you probably meant is how many months in 2011 had 5 Tuesdays. March, May, August and November all had 5 Tuesdays in 2011, so that is 4 months.
It will be either 4 or 5, depending on what day of the week the 18th of March is on. There are 4 full weeks and two days, so that means there will definitely be 4 Tuesdays. If the 18th of March is a Sunday, Monday or Tuesday, there will be 5 Tuesdays.
11 weeks and 5 days.
34 weeks and 5 days.
39 weeks and 4 days.
8 weeks and 5 days.
A little over 43 weeks between March 4 2010 and January 5 2011.
5 months
32 weeks and 2 days.
14 weeks and 5 days.
January, April, July and October 2013, all have 5 Tuesdays.
When the question was asked, on the 9th of February in 2011, the answer was 5 weeks and 3 days. On the day the question is being answered, the 31st of December 2016, it is 302 weeks since the 19th of March 2011.
5 weeks