How long should I give a petition to work?

Hey all, beginner question here. I'm planning on trying out a petition soon. I watched Olivia's video on YouTube and I noticed that her example was that she would have rent money by the end of the week. My question is, does that timeline work for all petitions? Are there certain petitions that I should give a longer amount of time to manifest? Or does it really all just come down to the strength of my intent on the petition working? Thank you in advance for any advice😊