1)
What do we learn from "Delef Tored b'Yom Sagrir v'Eshes Medanim Nishtavah"?
1.
Yevamos 63b: An evil wife is as harsh as Yom Sagrir (Rashi 63b - a day of hail and wind).
2.
Rashi: Rain that drips from the roof into the house, and disturbs the household, on a rainy day when all are closed in the house - this is the same as a quarrelsome wife.
3.
Malbim: A drip annoys only b'Yom Sagrir, when the clouds close [the sky] via wind from the vapors - "Motzei Ru'ach me'Otzerosav" (Tehilim 135:7). A quarrelsome wife is consistent - she always annoys, also on a clear day.