If you do three morning pages every day, you’ll write 273,750 words every year (assuming 250 words/ page.) That’s Crime and Punishment plus Lord of the Flies, all before breakfast.
Writing three hours a day gets you to 10,000 hours of practice in ten years. A decade will go by fast if you’re living the kind of life worth writing about. Graham Greene wrote 25 books in a lifetime of three hour days.
Just three pages a day for a year is over a thousand pages. You could still draft a novel in a year writing just one page a day.
Will Self measures his output in “Conrads.” One Conrad is 800 words. At a rate of one Conrad per day, you can write a short novel in under 70 days.