DD1 was left for a full 12 hour day (FDC) from the age of 5 months when i returned to work 2 days a week.

DD2 started at age 8 months but my then i was back home not working and they both now only go 7 hours 2 days a week

Ive left them for 2 nights at a time when IL's came to visit and DH and i went away for a weekend.