Answer

A commonly accepted Jain source does not give a fixed number of years for Rajul’s kevalgyan paryay. It says that after Lord Neminath became omniscient, Rajul took diksha, spent the rest of her life as the head of the nuns’ order, and later attained liberation. ( jainworld.jainworld.com)

Explanation

So, if you are asking for an exact duration in years, that number is not commonly specified in the standard account I found. The tradition presents her as having lived the remaining part of her life in spiritual practice after attaining that state. ( jainworld.jainworld.com)

Takeaway

For Rajul, the usual Jain narrative gives the event and spiritual outcome, but not a precise year count for her kevalgyan paryay. ( jainworld.jainworld.com)