I want to know the answer to the following question:
In what period did Vyakarana begin?
All the background I'm provided with is that "Patanjali, who lived three centuries after Pāṇini, wrote the Mahābhāṣya, the "Great Commentary" on the Aṣṭādhyāyī and Vārtikas.". Is that enough to answer the question?
Answer: no