I am on my 9th day today. Tomorrow will have to finish due to job commitments. Currently i do three 9 day fasts a year with 2 day fasts every fortnight.
Fasts for under 10 days are convenient, as they dont take long to break, just a week. Longer fasts are trickier to find time for, if you work full time. When i was a student, i could do a couple of 15-20 days fasts, but now i work. Hope to have a 15 days fast next year during my holiday!