i mean this: https://www.tigerdroppings.com/rant/o-t-lounge/are-modern-fa...
the average mother spent 54 minutes a day caring for children in 1965 but 104 minutes in 2012. Men do less than women, but far more than men in the past: their child-caring time has jumped from 16 minutes a day to 59.
Also, per the numbers time spent caring for children has tripled since the 60s and child rearing outcomes don't seem better at the same time as women have entered the workforce. Since society didn't also invent some magic stimulants that reduce sleep requirements in that time that's a bad deal no matter how you look at it. We're wasting more time to get the same amount done.
i don't know what that means though. either women were already working in the 60's or while they were at home they did many other things besides taking care of the children. (i suppose some housework got more efficient thanks to technical advances)