Answer

In Tivihar Upvas, there is no fixed number of times you must drink water. The usual understanding is that only boiled, cooled water is allowed during the permitted daytime period, and it should be taken sparingly, only as needed. Some Jain explanations also state that there is no strict limit on frequency or quantity, but the spirit is restraint. ( jainqq.org)

Explanation

If you are following Tivihar Pachkhan / Tivihar Upvas, the focus is on avoiding food and taking only water within the allowed time, usually between sunrise and sunset. The tradition emphasizes taking the minimum necessary, not drinking freely. ( jaintreasures.org.uk)

Spiritual Understanding

The purpose of Tivihar is self-restraint and lessening attachment to the body’s needs. So even when water is allowed, it is taken in a very disciplined way, with awareness and simplicity. ( jainqq.org)

Takeaway

Short answer: there is no fixed count, but drink only as much boiled water as necessary, and only within the allowed time. ( jainqq.org)