A 50 ml scent (ScentPod) lasts on average 1 to 3 months in our Smart Aroma Diffuser. This depends on two things:
How many hours per day the diffuser is running
What intensity you've set it to
In the manual you received with your diffuser, you'll find how many milliliters of oil are used per hour for each intensity level.
If you use the diffuser on average 12 hours a day at an average intensity, a scent lasts a good 2 months.
If you use a high intensity and have it on 16 hours a day, a scent still lasts at least 1 month.
In short: the more often and stronger you diffuse scent, the faster the bottle runs out, but even with intensive use, it lasts a long time.