6 verses have
two
in Edition Clear Qur'an by Talal Itani / Al-Kahf (The Cave)

18:12Then We awakened them to know which of the two groups could better calculate the length of their stay.

18:32And cite for them the parable of two men. To one of them We gave two gardens of vine, and We surrounded them with palms-trees, and We placed between them crops.

18:60Recall when Moses said to his servant, “I will not give up until I reach the junction of the two rivers, even if it takes me years.”

18:82And as for the wall, it belonged to two orphaned boys in the town. Beneath it was a treasure that belonged to them. Their father was a righteous man. Your Lord wanted them to reach their maturity, and then extract their treasure—as a mercy from your Lord. I did not do it of my own accord. This is the interpretation of what you were unable to endure.”

18:93Until, when he reached the point separating the two barriers, he found beside them a people who could barely understand what is said.

18:96“Bring me blocks of iron.” So that, when he had leveled up between the two cliffs, he said, “Blow.” And having turned it into a fire, he said, “Bring me tar to pour over it.”