How many days should I wait before double-texting a friend who left me on read?

[Anonymous]

My online friend usually replies to me, but I gotta admit that my message didn't really warrant a reply.

Anyway, it's been now 4 days since my last text. And I haven't heard from my friend in 6 days. How long should I wait before double-texting my friend? 7-8 days? That means I'd have to double-text my friend on Thursday/Friday.

[Guy13]

If you do it Thursday then Reply comes Sunday-after weekend?

[Asker]

What?

[Guy13]

I am answering your question directly.

[Asker]

Yes but what exactly do you imply? That if I text my friend this Thursday, she will reply on Sunday?