I have several plain-text files that contain only English prose. The material is generally well structured, but it still suffers from scattered spelling mistakes and occasional typographical errors that need to be fixed before I can import it into a database. Your task is straightforward: read each file, identify every typo, and return a cleaned version with accurate, standard English spelling throughout. I do not need any re-formatting, duplicate removal, or additional transformations—just precise correction of misspellings and obvious keystroke slips, while leaving punctuation, line breaks, and overall layout exactly as they are. You may work in the tool of your choice—Python scripts with spell-checking libraries such as pyspellchecker or text-processing utilities like sed/awk are fine, and manual proofreading assisted by software such as Grammarly is equally acceptable—as long as the finished files are 100 % error-free and retain their original structure. Please let me know how many words you can comfortably process per day and outline the method you’ll follow so I can gauge turnaround time. Once hired, I’ll share a small sample first; if the cleaned sample meets expectations, I’ll release the remaining files in batches.