I mean, it depends on the language of the NDA. As a quick example, this random free template I found online[0] uses "5 years". [0] https://www.docracy.com/1/g

I mean, it depends on the language of the NDA. As a quick example, this random free template I found online[0] uses "5 years". [0] https://www.docracy.com/1/generic-nda https://www.docracy.com/1/generic-nda