Photo Upload Frequency

I find that regular, small uploads are easier to manage and maintains a steady trickle of new images to my Portfolio. When I identify an image that has potential for stock sales, I edit and move it to the Adobe Stock Publish Service in Lightroom Classic, then I send those images to Adobe Stock about once a month where they remain in my "Uploaded Files" tab until I have time to work on the titles and keywords. I submit 4-6 images at a time and wait for feedback on those before submitting the next batch. 

It is a good idea to upload frequently; I personally would aim for at least once a week. I think uploading a few at a time is also a better option rather than a whole bunch at once.

It's better to upload regularly. If you have the time, upload once a day. It's also good to submit smaller batches than one big batch. You have more opportunity to react to rejections.