Hi, The link will show you the regulation in force.
http://dgca.nic.in/cars/d7j-j3.pdf
The average hours flown per month could be anywhere between 60-80. During holiday season...you could fly upto 100h a month.
Yes it gets a little exhausting if the planners slip on their planning. When things are in control, it could be two mornings, a mid day, followed by one or two evenings.
Rarely would one fly 6 on 1 off, though it happens. The more likely pattern would be 4 on 1 off. The days 'ON' would also include being Standby at Home.
The limit which stands in a pilots favour is 35h a week.
If what Ive written is unclear, please let me know. What Ive said here is general and not specific to any airline.
Warm regards,
JG