Does tribulation come to a person multiple times? And our sincere thanks to you.

Allah may test His servant at any time and with whatever He wills. The trial may be a single instance or multiple instances. Allah tested the Prophet Ayyub (Job) in his body, wealth, and family, and he endured it patiently, to the extent that Allah the Almighty said about him: "Indeed, We found him patient, an excellent servant, indeed he was ever-turning back to Us."