avocation (n.)
1610s, "a calling away from one's occupation;" 1640s, "that which calls one away from one's proper business," from Latin avocationem (nominative avocatio) "a calling away, distraction, diversion," noun of action from past participle stem of avocare "to call off, call away," from ab "off, away from" (see ab-) + vocare "to call" (from PIE root *wekw- "to speak"). Commonly, but improperly, "one's regular business, vocation" (1660s). Earlier (1520s) in a legalistic sense "calling to a higher court."
But yield who will to their separation,
My object in living is to unite
My avocation and my vocation
As my two eyes make one in sight.
[Frost, "Two Tramps in Mud Time"]