Answer:
Three days.
Step-by-step explanation:
While there are no rules when to do a follow-up of an application for a job, there are some obstacles which can be avoided in order to get employed in a desired company. While it is not common to call or send email to your employer after only a day, because they need time and concentration to check and evaluate your application, the sense of urgency must be avoided. But it is important to make a hiring manager feel that you care very much for this job, and that you could contribute greatly to the team you are managing to get into.