Cache docs possible error

I have found something very confusing the CI 3 docs about output caching.

On this page it says that the parameter should be in seconds:
https://codeigniter.com/user_guide/libra...put::cache

But on this page, for the same function it says it has to be in minutes:
https://codeigniter.com/user_guide/gener...ng-caching

I have always used minutes for my caching, but now I am not very sure if I am doing it correctly.

Could anyone please make this more clear for me, and maybe correct the docs.

Thanks

Glenn