How do I run multiple cron jobs? I want to run 4 cron jobs inside Drupal, in four different times. 

How can I achieve that? Is there any module for that?
Try out the Ultimate Cron module.


  Runs cron jobs individually in parallel using configurable rules, pool management and load balancing. Multiple rules per cron job. Configuration per job (enable/disable, rules, etc.)


There is also the Elysia Cron module.


  Elysia Cron extends Drupal standard cron, allowing a fine grain control over each task and several ways to add custom cron jobs to your site.