is it possible for an admin user to create a report on the login records for users in salesforce? I want to be able to analyze the login records for particular users, to a analyze login frequencies etc.
There is a standard report in the administrative reports folder named "Users Logged in This Week" which report lists all of the users who have logged in to Salesforce in the past seven days. This can be a good start to create your own report matching your requirements
You can find more details here https://help.salesforce.com/HTViewHelpDoc?id=reports_administrative.htm&language=en_US