In what duration was the earth and its contents created?

Imām Ibn al-Jawzī (d. 597 AH / 1201 CE) summarized the scholars' opinions in his book "Zād al-Masīr":

1. He began by creating the earth in two days, then created the heavens in two days, then He spread out the earth and made it firm with mountains. Then He measured its provisions in two days. [Ibn ʿAbbās]
2. He carried out the creation of the earth and all that is on it in four consecutive days, then created the heaven in two days. [al-Ḥasan, Mujāhid]