It is against euphony to make two genitives of the same form follow each other, particularly when they are Saxon genitives.

[A]fter he had spent some months, and a round sum of money, in fruitless attendance and addresses, he fairly quitted the pursuit, and consoled himself with the conversation of a merry Fille de joye, whose good graces he acquired by an allowance of twenty Louis per month […].

It must be granted, poor George Wilhelm's case demanded circumspectness.

Pick a day, pick a week, and if the big man cops his whack, you're in.