How long can a pair of contacts be worn that are supposed to last 30 days?

I had an eye doctor appointment this morning to try some contacts and realized that for a year supply they’re 200 dollars, WITH INSURANCE. That’s out of my price range. I wear glasses 99% of the time, but every once in a while I want to wear contacts, usually for an outdoor activity, beach, yada yada. So I have a trial pair, and if I wear them today, then don’t wear them for 2 months, then wear them, then don’t wear them for a month, then wear them once, then a month later…..will they work? Can they be stretched over a longer period of time if they’re seldom worn? The brand is Bio…..something brand. Biofinity?