Why is the long lasting phase of mitosis seen the most under a microscope?

The longest lasting phase of mitosis is interphase, it is also called the resting phase. The cells, after they have divided do not divide for a while, and because the other steps are pretty quick in comparison you will see more of cells "resting" than the other steps of the process. I believe that interphase is 90% of the cells time, with the other processes happening in the 10% of the time left.