Jo Teen Saal Kay Baad Waqe Ho : جو تین سال کے بعد واقع ہو
1. Triennial : جو تین سال کے بعد واقع ہو : occurring every third year or lasting 3 years.
Tisra : Third : one of three equal parts of a divisible whole. "It contains approximately a third of the minimum daily requirement"
Teen : 3 : the cardinal number that is the sum of one and one and one.
Saal : Year : a period of time containing 365 (or 366) days. "It`s been a year since we talked"
Paidar, Taveel Muddati, Der Tak Baqi Re..., Mazboot, Badi Umar Ka : Lasting : existing for a long time. "Hopes for a durable peace"