Ma nuɣal ɣer wayen yeɛnan akud n tsiwelt deg ungal-agi Tiziri, nufa-d amsawal mi ara d-yettales ineḍruyen n tehkayt, yettuɣal s waṭas ɣer deffir, tettil-d tiremt (antérieure) acku tuget n ineḍruyen ɛeddan, iɛawed isawel-it-id. Syin akkin tasiwelt yella wanda tedda d teḥkayt tiremt (simultanée), axaṭar iḥekku-d deg lawan ideg yella. Tikwal daɣen texleḍ tiremt (intercalée), acku isawal-d aneḍru iɛeddan d win i d-iteddun maca tiremt-agi ur teṭṭuqet ara deg ungal-a.