Radekk, of Actar, omitted to report this small additional
element to the power word "SHOW" -

SHOW LESSONS IN <skill>

This will show you a reasonable approximation of how many
lessons you've invested in a given skill. Slight variations
may have occurred due to the earlier effects of myrrh, or
very small differences due to the order of training, but these
are quite accurate as a rule.

Penned by my hand on the 6th of Daedalan, in the year 433 AF.