Alfred, if you are like me, you have just a few hives. I have 3 producing ones at this time. I will also pretty much pull frames as I have time. I don't have an extractor and most of my frames will be foundationless and I will do "crush and strain". If you know anything about C & S, it takes a while for the honey to drain from the crushed comb, so unless you have some really big buckets and tubs, you can only do so much at a time. Like Riv says, if you have more hives and an extractor, it can take some time to set it all up so once a season is probably better.