It took me from August 2005 to May 2006 flying Fridays,Saturdays and Sundays.
The CFI would not do more than 2 one hour lessons a day as he reckoned that anymore was too much to absorb.
A lesson normally lasted 2hrs +, with briefing ,walk around check,flight of one hour and de-briefing.
I wanted to do it as quickly as poss ,but that is how long it took.
The weather is the problem,but it can be in the summer!
It took me 53 hrs total,so you could work out the actual lessons flown against possible ones if all was perfect.
Good luck.