How to check character limit for each field in Work History Section

Summary:

Is there any way to check character limit for each field in the Work History Section under Profile types?

Our goal is to identify a field with text type which can hold 5000 characters. Can DFF help us ? but I think DFF has max limit of 150 characters.

Content (please ensure you mask any confidential information):

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

26A

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