And the noun שבת (Sabbath) refers to the stopping of creative activity, and also can refer to Yom Tov (holiday). And the linguists, whose ways are to designate names for every matter, indicate the appointed times with the name חג or מועד (holiday) or with particular names -פסח, שבועות, סוכות (Passover, Feast of Weeks, Feast of Tabernacles). And one is unable to indicate the day after the first of Passover with the name מחרת החג או המועד (the day after the holiday or the appointed time), since this falls out during the seven days of the holiday, or with the name מחרת הפסח since this always means מחרת שחיטת הפסח (the day after the Passover offering) that is on the 15th of Nissan. Thus, the Torah is forced to indicate it with the nameמחרת השבת (the day after the Sabbath)⁷³⁸.

footnotes: ⁷³⁸ Leviticus 23:15.

And we also find שבת to refer to a week.

Leviticus 23:15 saysוספרתם לכם ממחרת השבת מיום הביאכם את עמר התנופה שבע שבתות תמימת תהיינה*(And you shall count to you from the morrow after the day of rest, from the day that you brought the sheaf of the waving; seven weeks shall there be complete), using the languageממחרת השבתfor “the morrow after the day of rest” and using the wordשבתותfor “weeks”.*