Image: A simplified family tree with King Henry VII at the top, then Edward on the left, slightly lower on the right is Mary, and much lower on the right is Elizabeth. An arrow points from each person to the next, in order. Henry to Edward, Edward to Mary, Mary to Elizabeth.
[Next to Henry] Reformation 1534 – 13 years – died 1547
[Next to Ed] 6 years – 19 years
[Next to Mary] 5 years – 24
[Next to Elizabeth] 47 years – 71
So in total that’s about 71 years of religious turmoil