The time needed to recognize text from your file depends on the following:
- Amount of selected languages (more is slower)
- Amount of selected pages (more is slower)
- Quality of your source image (better quality - quicker recognition)
Approximately, typical scanned A4 document took 10 seconds to recognize, but scanned books in PDF format, that contain 100+ pages may take 10+ minutes to recognize.
Unfortunately, we don't have a conversion progress for our OCR tools yet, so if you believe that your file is reasonably small and the amount of time it's been recognized is unreasonably big - read article about File conversion stuck on 'Converting' stage and restart your conversion.