Ten minutes? TEN MINUTES of WHIPPING?!
Good lord, no wonder her arms are so muscular. My grandpa in his prime couldn't smack the bottoms of his three eldest children with a slipper ten times in a row and she can do THAT for ten minutes? Put her in sports. She needs an outlet for all that aggression.
(For further context, my dad was the third one who rarely got spanked after his two elder brothers did. In all fairness, it was usually them who started the mess and he had tagged along because they were poor with nothing else to do. My grandpa worked 2-3 jobs through their childhood, too. Just saying whipping is a fully body activity and it gets tiring FAST.)