All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
The interval between Imraan the father of Prophet Moosa (Moses), may Allah exalt his mention, and Imraan the father of Maryam (Mary), may Allah exalt her mention, was 1,800 years as mentioned by some interpreters of the Quran. However, we have not come across any evidence that proves it or disproves it.
Allah Knows best.
Fatwa answered by: The Fatwa Center at Islamweb