幾日も幾日も: day after day

the twentieth day of the month / twenty days / Short for 二十日鼠 (hatsuka nezumi): a house mouse

one day, 24 hours / the daytime, the period from dawn until dusk / (figuratively) a short period of time / one day, someday, an unspecified day / the first day of the month

regular day off (e.g. closed every Monday)

twenty

Alternative spelling of 二十 (nijū): twenty, 20

Alternative spelling of 二十 (nijū): a twenty-year-old

a surname

Alternative spelling of 二十歳 (hatachi): a twenty-year-old

Alternative form of お日様 (o-hi-sama)