quotumus

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

quŏtŭmus, a, um, adj. [quotus],

of what number (Plautin.): quotumas aedes dixerit, ego incerto scio, Plaut. Ps. 4, 2, 7: quotumo die, on what day (by number)? id. ib. 4, 7, 77.