You can use the Tridion Docs workflow report to find the number of topics, maps, and images in a publication. You might need this information to plan for activities, such as review and conversion.
Note:
The file count from the workflow report is based on the publication baseline. The baseline includes all objects referenced in the publication, such as topics that you reuse from and content that might be excluded from the output using conditions. So the files in the baseline can include more objects than that available in the output.