oral fluid tests....any one know how far they go back?

I recently passed a cheek swab test after quitting marijuana for about 5 1/2 months. I then smoked at least once or more each day after getting the job for about 2 months and then quit again. It's been about 3 weeks since i quit and i'm expecting another swab test very soon for a lateral promotion. My question is....how long do these cheek swab (oral fluids) tests go back? I'm guessing once i'm clean, I'm clean for any test, right? I just wanna know what you guys thought for a little re-assurance.
:thumbsup:

THC metabolites have different detection times for blood, urine, saliva, and hair. You could pass an oral swab but fail urine. You could pass urine but fail hair. You could fail urine and pass hair too. t all depends as all tests are not created equal.

Oral fluid has a detection time of 24-80 hours. Most people will pass 24-48 hours after last use.