A cutie pie aka qp, aka quarter pound would last me a good while. Never as long as I originally plan, because when you have more, you smoke more. And use more for joints or blunts which when you have more you are more willing to roll up a fatty,
Whereas if you got a dub or a 20 sack or less a NUG, you probably going to use a bong or pipe and hold that inhale until its evaporated into lungs because goal is maximum high.
Roughly a zone or oz SHOULD last 4 weeks or more for me, but usually is less, so if I had a qp I would say I'm chronically set for a solid 3 months.