15 verses have
when
in Edition Clear Qur'an by Talal Itani / Ash-Shu'araa (The Poets)

26:20He said, “I did it then, when I was of those astray.

26:21And I fled from you when I feared you; but my Lord gave me wisdom, and made me one of the messengers.

26:41When the magicians arrived, they said to Pharaoh, “Is there a reward for us, if we are the winners?”

26:61When the two groups sighted each other, the followers of Moses said, “We are being overtaken.”

26:70When he said to his father and his people, “What do you worship?”

26:72He said, “Do they hear you when you pray?

26:80And when I get sick, He heals me.

26:88The Day when neither wealth nor children will help.

26:111They said, “Shall we believe in you, when it is the lowliest who follow you?”

26:124When their brother Hud said to them, “Do you not fear?

26:130And when you strike, you strike mercilessly?

26:142When their brother Saleh said to them, “Do you not fear?

26:161When their brother Lot said to them, “Do you not fear?

26:177When Shuaib said to them, “Do you not fear?

26:218He Who sees you when you rise.