Quotation for Ketubot 132:9
את"ל מנה המתקבל יום ראשון או כל יום ויום את"ל כל יום ויום שבת ראשונה או כל שבת ושבת את"ל כל שבת ושבת חדש ראשון או כל חדש וחדש את"ל כל חדש וחדש שנה ראשונה או כל שנה ושנה תיקו
And if you could reason to say: [“In respect of each] maneh for which [obligation has been] accepted” [the question arises: Is the allowance to be made only on] the first day or every day? Should you find reason to say: Every day, [the question still remains whether this applies only to the] first week or to every week. Should you find some reason to say: Every week, [it may be asked whether this applies only to the] first month or to every month. And should you find some reason to say: Every month, [it may be asked whether this is applicable only to the] first year or to every year. All this remains undecided.