Personlly i would try something like this.
Until around 9 months as often as possible but for short periods if alone, so say 3x a week for 1 hour, or if able to be amicable then longer times visiting your house would be ideal and more relaxing for the baby.
9-18 months until bedtime after work one day and 4-6 hours at a weekend
18 months-2 and a half, 6-8 hours a weekend day and an evening after work until bedtime (if possible dad doing bedtime at your house on those 2 nights)
2 and a half- school age, lunchtime - the next day lunch time and one evening.
School age one evening a week and every other weekend fri-sun evening.
The key thing is going by your child rather than 'what is standard' though. So you may find your child is very relaxed and happy to do more than that, or they may be clingy and need a bit longer to be ready for being away for longer patches of time.
My 5 year old still doesn't want to go for overnights away from us, but my 1 year old would probably be happy to at this age so it really depends on the child.