When does the mucus go away after you stop smoking?

Let's put it out there now and say that I haven't completely stopped smoking, on occasion I will smoke at a party (mostly when I'm drunk), and I did smoke for a little bit when I started my first job about 3 months ago. So, obviously my mucus will still! Be here, but I was wondering, how long does it take to actually go away? How long did it take you if you've quit? Also, I vape, would that effect it?