Is there any out of the box method to capture how much time a SR has been worked on?

Summary:

Content (required):

We want to capture the amount of time a service request has been worked on by the agent to which it is assigned to. Is there any out-of-the-box way to do this?

Version (include the version you are using, if applicable):

23C

Code Snippet (add any code snippets that support your topic, if applicable):