Looking on the internet deeply has found these results:

during summon is the most popular phrase on the web.

during summoned 11 results on the web	during summon 124 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Summon Sword: Berserk, This skill can only be used during Summoned sword state and will do AOE damage around the selected target with 3 ...	By the way, walking away from the car during summon will not stop the vehicle, even if the key fob is out of range. Last edited by electrish; ... During Normal Modulating Phase (not during Summon or Chocobo Mode), the player has a chance of witnessing certain flashback and "behind the scenes" ... Jan 3, 2015 ... (Only during Summon Infected) The Infected will stay alive in the arena for a short amount of time during which Judge summons a ground ... Nov 5, 2015 ... ... less than that and the bait will be consumed without summon. So for now always carry more than one truffle worm during summon attempts.

during summoned

11 results on the web

during summon

124 results on the web

More popular!

Summon Sword: Berserk, This skill can only be used during Summoned sword state and will do AOE damage around the selected target with 3 ...

By the way, walking away from the car during summon will not stop the vehicle, even if the key fob is out of range. Last edited by electrish; ...
During Normal Modulating Phase (not during Summon or Chocobo Mode), the player has a chance of witnessing certain flashback and "behind the scenes" ...
Jan 3, 2015 ... (Only during Summon Infected) The Infected will stay alive in the arena for a short amount of time during which Judge summons a ground ...
Nov 5, 2015 ... ... less than that and the bait will be consumed without summon. So for now always carry more than one truffle worm during summon attempts.