Who knows two hundred twenty?
Please cite/link your sources, if possible. At some point at least twenty-four hours from now, I will:
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The Egyptian exile was foretold at the Bris Bein Habesarim 220 years before it happened. (The BBH took place when Avraham was 70 years old, in the year 2018 since Creation; Yaakov and his family descended to Egypt in 2238.)
Also, Chasam Sofer states (paragraph beginning או שי"ל) that the Egyptian exile should by rights have lasted for 220 years, since Yosef's ten brothers (by their selling him) each caused Yaakov 22 years of misery. However, Hashem kindly deducted a year for each of them, for the fact that they themselves had to experience the distress of dying outside Eretz Yisrael.