There are several reasons why your scanner may take a long time to process documents up to 2000 words. The most common reason is that the document is large and has many pages, which increases scan time. Another reason may be that your scanner has a low resolution setting, which takes longer to process a large document. Additionally, your scanner may be scanning in a file format that takes longer to process. Lastly, there may be a technical issue with your scanner, such as a hardware or software problem, which could increase the time it takes to process a document.