|Agama period PÚriode Agama A hÓm thời 阿含時
According to Tien Tai School, the Buddha's Sutras are divided into Five Periods:
1. the Avatamsaka Period,
2. the Agama Period,
3. the Vaipulya Period,
4. the Prajna Period, and
5. the Dharma Flower-Nirvana Periods.
The period of speaking the Agama Sutras, 12 years during travelling in 16 countries, was for the teaching of the Small Vehicle, and for those with the lowest situation.