gèng hǎo de shuōfǎ shì zhōusān xiàwǔ bù fāngbiàn, zhōusì shàngwǔ huò zhōuwǔ xiàwǔ dōu kěyǐ

更好的说法是：“周三下午不方便，周四上午或周五下午都可以。

A better way to say it is: 'Wednesday afternoon is not convenient; Thursday morning or Friday afternoon are both fine.'