For sake of time, the more you pay for a ticket or the higher the class (like first class), the better the fare letter or fare code you will get. (milestothemax.com)
There are a lot more reasons, but for the sake of time, I will not go through with them. (religion.blogs.cnn.com)
I'll probably be doing that on Thursday for the sake of time as well. (ourpaleolife.com)