Thomas Davidson,
Chambers's Twentieth Century Dictionary 1908…
(1908)
“ Avocation, a-vo-kā′shun, n. formerly and properly, a diversion or distraction from one's regular employment—now, one's proper business = Vocation: business which calls for one's time and attention: (arch.) diversion of the thoughts from any employment: the calling of a case from an inferior to a superior court. [Through Fr. from avocation-em, a calling away—ab, from, vocāre, to call.] ”
