How do I define the frequency of my mongo backup I want to know if there is a way to define in Mongo the frequency of backups have to be executed. There is any config file for that? An example will be excellent!!

UPDATE

I want to create a automated mongo configuration. With this configuration I want to define the process of backup. I want the backups process be executed based on my time frequency, for example every two minutes. 

So I don't know if there is a possible configuration for that. I prefer a configuration file because I want to create an automated provisioning and with commands it becomes more hard to automate.
MongoDB doesn't have an automatic backup feature built-in -- you have to choose an appropriate backup strategy using command-line or third party tools.

The backup procedure will vary depending on your deployment type (standalone, replica set, sharded cluster), disk/dbpath configuration, and backup requirements. 

Unless you are using a third party tool, it's best to follow a supported procedure from the MongoDB manual.