English term (edited): frequent replacemet lenses greater than 6 months

"frequent ... greater than 6 months" means here with a higher frequency - more often/frequent

Precision UV Monthly soft contact lenses by Ciba Vision. Precision UV offers the convenience of monthly replacement or sooner - that is, you take them out each night and throw them away after 4 weeks or sooner. With Precision UV soft contact lenses, you start with a new pair. That's right: Replace your soft contacts more often than every six months or a year. You'll love the freedom of crisp, clear vision and the enhanced comfort frequent replacement lenses can bring.
Frequent Replacement for Greater Comfort It's natural for comfort levels to decline the longer you wear a pair of ordinary soft contacts. Deposits from your tears collect on the lenses, blurring your vision and causing discomfort. Even careful cleaning won't entirely eliminate this problem. Replacing your contacts more often than once a year or every six months reduces the chance of irritating build-up of protein deposits and lessens your chance of eye irritation.