Doing a dbcc checkdb can take a lot of time, and in case of corruption you really want to see the progress.
You can use the t-sql statement below to find the progress. Keep in mind to replace the YOUR_DB_ID to the id of your database. (find out in sys.databases)
SELECT session_id , request_id , percent_complete , estimated_completion_time , DATEADD(ms,estimated_completion_time,GETDATE()) AS EstimatedEndTime, start_time , status , command FROM sys.dm_exec_requests WHERE database_id = YOUR_DB_ID and command like 'DBCC%'