Earlier quoted context omitted.
And let me put it this way: Every working couple except for one that I know with a kid has hired a nanny for at least some portion of the time, including myself.
A nanny is not a part-time worker. That is a babysitter. A nanny lives with the family.
The key difference is that a nanny is usually a formal salaried employee with regular contracted hours, whereas a babysitter is typically paid an hourly rate and is self-employed.
https://www.care.com/a/what-is-the-difference-between-a-baby...