Leaving 10 mo bf baby for 5 nights - how often do I need to pump to maintain supply?

[CityDweller]

Just that really. I'm (potentially) away for 5 nights/ 6 days when baby will be 10 months old. I'll leave expressed milk for him to drink, but am wondering how often I'll need to express while we're apart in order to maintain my supply? He's currently 8mo and has 5 bf during the day and one overnight. I'm hoping that by 10 mo he'll be down to, at most, 4 feeds during the day and will have dropped the night feed.

I left his older sibling overnight whilst still bf, but it was for a much shorter period (2 nights) and she was nearly a year old. And I can't remember how often I expressed while we were apart!

[ZZZZ1111]

Personally I would pump as many times as he would usually feed eg four times in the day if that's what he's doing by then.