Seems like he wasn't the only one, look how the word leisure was used before: school (n.1) Look up school at Dictionary.com "place of instruction," Old En

Seems like he wasn't the only one, look how the word leisure was used before: school (n.1) Look up school at Dictionary.com "place of instruction," Old English scol, from Latin schola "intermission of work, leisure for learning; learned conversation, debate; lecture; meeting place for teachers and students, place of instruction; disciples of a teacher, body of followers, sect," from Greek skhole "spare time, leisure, rest ease; idleness; that in which leisure is employed; learned discussion;" http://www.etymonline.com/index.php?term=school http://www.etymonline.com/index.php?term=school