Drupal - How to track user logins

I think you are looking for User Stats module.

Provides commonly requested user statistics for themers, IP address tracking and Views integration. Statistics are:

• days registered;
• join date;
• days since last login;
• days since last post;
• post count;
• login count;
• user online/offline;
• IP address;

Just to close off this question I will share how I managed to track the user login times.

I simply wrote a module that added a table to the db and on login I would add the login/user event + date-time to the table.

Then I was able to access how many times and at what time users were logging in. This was something I wasn't able to get from the User Stats module.