What is an Anusthan?
An anusthan is a sadhana of a specific number of chants of a mantra completed over a specific period of time. The word anusthan means to stand firm; in other words it is a resolute commitment.
Typically, the number of chants in an anusthan is 125,000 spread over 9-40 days.
The 9 day laghu anusthan is popular over the festival of Navaratri.