How long was Yosef in Potifar's house?
Da'as Zekenim, Hadar Zekenim: He was there one year - ba'Bayis in winter, uva'Sadeh in summer. Seder Olam says that he was one year in his house, and 12 years in the dungeon.
Hadar Zekenim retracted to learn unlike Seder Olam. Refer to 40:1:151:1*,2