There's no way farming was only done 5 sporadic months of the year, that livestock keeping would allow you to just fuck off and not work that frequently, and they often did things like produce parts of their own cloths etc which I would count that much sewing/darning to be work let along the rest of the homesteading requirements...
With weekends, public holidays and vacation days I work 220 days a year and with 8 hours a day that's probably not far off the total hours of the 150 work day medieval peasant
Depending on where and when you're talking about, if you were a man, if you weren't farming, you were at the front lines of the king's army with a spear and no armor.