I move often! Help me understand the Sec 121 Tax Exclusion time

So, I'm in the military and have now moved 3 times in 3 years.  I need advice/validation that I can utilize the US Code 121 Exclusion of gain from sale of principal residence more then every two years if the reason I am moving is due to employment and that I am only taking a partial exclusion (prorated based on amount of months spent in the home OR since the last time I took the exclusion)... does that sound correct?  Thanks.