Why explains Anandiben Patel`s unusually long tenure of nearly 7 years as Uttar Pradesh governor?

In UP’s history since 1950, very few governors have completed full five-year terms.

Why explains Anandiben Patel`s unusually long tenure of nearly 7 years as Uttar Pradesh governor?
In UP’s history since 1950, very few governors have completed full five-year terms.