Do you mean when you log in 2 to 10 times a day? Or when you open 2 to 10 NEW accounts a day? If you just log in then there is no problem. You could log in 10m times and there would be no problem. If you open new accounts then obviously there is a problem. Only 1 account per IP is allowed.
if you are having problem with login with adsense account then just clear cookies and history it will work ....
if u happen to have "multiple" accounts, just make sure you clear ur cache, and use a different ip to log in each time........... I can help on Adsense. PM
If you have an adsense account and you are login to your account 2 to 10 times a day, there is no any problem for doing this.
I had only one time I refreshed Adsense to many times and was sent to a captcha type page to verify I was a real person.