How to do Cron Job in Console Application and How to trigger Weekly?

I want to create a cron job to send email to particular email id's from database.

Brief overview : This is time management system. So, users can enter the working hours daily. I need to check the time sheet by weekly basis. If the team member(users) enters working hours below 40(for 5 days in a week) it should send the automatic email to the particular team leader. Similarly for greater than 60 hours(Maximum hours) also it should send email to particular team leader. I need to do this with cron job in console application.

So, How to do this and and how to get the particular team leader for team member when sending automatic email.

Help me to achieve this. Any knowledge transfer is appreciable. Thanks in Advance

via Chebli Mohamed